cloudflare
tcp/443 tcp/80 tcp/8443
Open service 2606:4700::6812:7a2f:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4527
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f33a46883a-SIN
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f33a46883a</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2400:6180:0:d0::13f7:9001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&
Open service 2606:4700::6812:7d2f:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f3dc697b39"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f3dc697b39-SIN
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f3dc697b39',cH: 'sTsX4W9KS0qoEF2fl_y_9E_dmFNMG.tMTcyCaBxK0cU-1769177756-1.2.1.1-z3lRAXezosz4wLghhmE.V8W_1Pi4Tbv4gUtZ2NUMEoBExjHWK2lS8ujl8I4Tdvaz',cUPMDTk:"\/?__cf_chl_tk=9ip2PPHbJ1O0IaO91zz5GikCJz_eJheXgAl2yiGMwvU-1769177756-1.0.1.1-R7ZRYYe_SHy6q3GowY_ZxX2BD9L2RmPiTbM9.uoH5GQ",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=9ip2PPHbJ1O0IaO91zz5GikCJz_eJheXgAl2yiGMwvU-1769177756-1.0.1.1-R7ZRYYe_SHy6q3GowY_ZxX2BD9L2RmPiTbM9.uoH5GQ",md: 'gBfoSGcn2HQtckNA_fRbwcUX8eYeRJHkq3ol8cMxAjo-1769177756-1.2.1.1-iVoQbrxMJuaFYMrKbMQuIheXZwRn94lvOUwyOoiPqhit2tfiP14PH7ByNoSih_nK.HmV43GCu_oFpBrTqDF4ApOdGVEMQOqPuD4Kl31vk9UyI2ik42syaZhUZ9djzXxSQNewLBMR1xAi8OJlf0QVtBOYqYA.XtvccMpYY8J8_Hhl4clSKD3VJ6rp1M28Exdn4elx8cJ5EUkqrS4b1lQ03UhwMDH1KUuMuXBIcmrn11P4WPu4reJc_bhimzfUQF57I37ujtWw_iHy2GvEN.y08K9NBlR8IdtP_vcsdfulqYvfSmWKbEF064MBu17nqjXBMUPMMNsUHVSu3Nvq7wZxn1Bx7rsRtnodDlHOcjNvYuztQcH7sHuKYjQ8F7670g5umidQ3e.TjimCRK9ECNOTcwRAI.vy0eQOKixVI7I96IRTkoV3uDOjIeauR.xklhzPb4lfM8ZULsvGvNE9YGv50yaP1W4fUGVhxX9FBHzOluICdb2nUd9cGenzsGV4M2kK25C7r6hiyqylFRrIbK8d.G5S_AzFvwnH8QiuN_s9C3fJBUy.KKg3mc6Fkst8dDhkWYYj96Oz2vg0hnuNXKiTPdsa6HLHwMZ_D2FNdjmjSKOPglhbeFVv0uIBrYyMBZaZRD0DQYwIlmoaei9iAhmCPIY9XNpW4nbzkUQOrWidwaT2cOGYjyG6ILozXusV5XDASPVyUrZzkYl_Eip3drJRKkvOYuNeAnmOU2S.7ianB91nX5xpX6iuqnneN4ZBvCXz10GrhrrD2ixU.8bAc2XmvMzPDq7G_XUU9xEnIpEp5vcfnQjbHzEURQGnzBQRMWtQgZFO832M0w83QaPX4cEV6CYhITyYuZBQkuO2VT70KOWkH_sRM2vjCHB7iveWlKIBK7tqzU0mBJBkla8D2luYbmfnWoQPeNAdWAsH3LeEoRVBHXBsZLMl9cMcLEKfLZ2.r95qyLUX3vphMNK4JOorpUSt.NQgMnhw_TptR0x7OI3ZxBT3rK4Q.TZFn7PLZT8j5HJmxKwq9KfF74oj_YfXcw',mdrd: 'w7_oJCom051RRt8mJs5MLVEH753MqtdRs3tZP6wlZ1o-1769177756-1.2.1.1-4OagQEBrcqm8KMKfXenIjDw.CIWWhQ2fX_z8KT0XBFTX9sjDHH2KgHTM4hmSwBFgLytzl_7XtDpBn7zJpvuwwgnhN3PrkfOSeOHg4OoQ3f6lE9gnML1s4qCX3JnabmQT5ZBGs5luucwGHDBPBNjo9Tjw9L5sU2IqrCehDU_KI4rehLeX.TDJhCJcoera_qiyV_ffC6zeAmUpmpbqVPfpHqqXgCI5gFF3t5nkWj_LIqtqPQ8onjsYvFgSX84kWopBRwSGWOHDh41zU8w.hwlDYW6yYdaArTv1wQhcC_QM6EkcVV7SsUTEqP7btaTTk1DDN7EiMsCL9HNU8hQwoTcCUhfofbwYtp_iMz1Pg
Open service 2606:4700::6812:7c2f:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4528
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f32c3febb4-YYZ
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f32c3febb4</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2604:a880:cad:d0::db0:b001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b
Open service 104.18.124.47:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4516
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f31f8e33d0-AMS
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f31f8e33d0</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">142.93.129.190</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLi
Open service 2606:4700::6812:7e2f:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8716
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f47db24e6f"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f47db24e6f-EWR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f47db24e6f',cH: 'uIjMKxk7MBm5G3ErJ9v44aDQAocfMNkJnK3yno6_K54-1769177756-1.2.1.1-9CZVHh1JPZXvn6qJJ4E53RpSUasg1voRjmQ7h1b9CQawWnPbV4yyLKKoMu9JBA_Q',cUPMDTk:"\/?__cf_chl_tk=4m7584h4feuOpxidm5uxQVnpC7_TAACh0MdGxHomqIc-1769177756-1.0.1.1-68OE5SrAqxRfBT1ISIQiQsTcKt9lJirxc3Nb3ADZo8k",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=4m7584h4feuOpxidm5uxQVnpC7_TAACh0MdGxHomqIc-1769177756-1.0.1.1-68OE5SrAqxRfBT1ISIQiQsTcKt9lJirxc3Nb3ADZo8k",md: 'MpPBoFAXMF5koGpWWkTR2XStcDwMSZYvulLix5SgJwA-1769177756-1.2.1.1-OKlrjGJNsnHTqTrgeDZ69MecGbUBzPgUOFrx2FjmB2cF7bKDpkpFo6POccHLSCzD.eDqT8k4qlacK2iPqKqHNk_3Dwgc9ZmTzGz_aCG1NLeBM4ULM9PZn4hnPnD9AUFvSbSn9B05WZOFg9GUirjfNFDFGQyp7MW7dIGkVBVqOafcHPc9v6oCwKCv5tLhtFgfQb3wltgn59KKOjuASuLS5GRWa.E.yjEYCt212NoE3Qcf8KvRuvub5CA6eBWwoTI3DpmLxhqicru4GLFP1d5WHWSja2I3gAeM8KdplKYvO3O2me3x8qRiMb1PggGEeA1bBwfkmikeo5GDZoEWhbcZqrqhZQntrUS9tne19JuAy7gKhPLa3Er_fVHpJUvDe_7y40AEePyWOGLbv5cU_jFP0yGcP_fGfBHYcn3U0a_NvnZy7t6WPIZEPepUMR5uentv9EaQDeYhzMU02c8qd98kOhPIjSySiDwDMJE.eiYC4TJIase2GTm4bItU47MfQANGxUeHWp6f6sIPFy2K4XMRuxENvY06BRh5JRvqdLDIJWEfSkIeqlg4XvJOd.59JVoF2EAE2iJuFHQTjQJTwq9sne6LKuScQk8NZlkdxxcSls.bb58VvuBVAL9xOIg90IXUmWfvpT3xh.VumwPi5B4k_JWklOFIQTRpkdVMnL6yCrlgZPkPINZnBz8Pp1ifB8ZufmQcfp24osAbU0U65XI0itq_FKFWNwYrIc1Jnit4_w8M7EoUPSu7NooYYv2N16IHhG63L76HTXkUm8AB.G1XUrTbag.FbvaBa8yPfXTGGJKSaD6oXfzQbZENvCEshe2ec.N_IewoYE3vpfGp_tsY5tpycXBlCJWj4.N0eFrrHE5RkBSTItQUXs9lKvgwm72xQrmBjGoB7pY9NQS.YOs2iGRJ8DLIcuVk.Xrd4G5LxHTzhygIAEGwYXIsK5i0Pst_q_0mVAztQdJz17wkiRHFJDRYjxnTQ0kBzeMzgfbHu9VVVuRLtH3jyrw9ziihLA0F4BEAOj2EAMIYdFyjzJITKg',mdrd: 'YYlQddTh_IqhzjwQaQWzXbUYFmc2Fdr0v1KjzfUo5BM-1769177756-1.2.1.1-i0EgEz_sBVuk0ZqVdwoJX9D_F.s1FnKA4YXoM7RybC69zU_0cSVT.sJR07CRiUNq6mWD3RvqfDnYHLuOsDkTk_kwj27HRVX_zdAsi09P_vhF8pcJA_MpZC1JT3J0gjoq_dCGhMEife_hcXF6TMM_7UGdXEebz2YPyJ_c8h1Pgt0vGd8sGxthC3gwUMqf3EsNOZvbTB2Ar8nUs5R1ioBJMbdQmQNNwLJGb.IQ_Kg9teYoHZtZyYpRu3uarpzqVgeJw18bckulVo5HXGMWRasxypd.uPrZ7c3PT2A5lNYxKS3ThzaC1QIzBwzdLPQRnJGa9ZSrOFthkUsE17tDMfi9MyluROyKNDiPhb7Wp
Open service 2606:4700::6812:7e2f:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4528
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f4cf4b6e28-EWR
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f4cf4b6e28</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2604:a880:800:10::904:4001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b
Open service 104.18.126.47:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8652
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f40a1c35e2"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f40a1c35e2-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f40a1c35e2',cH: 'WYCi7OgJY.G1.Sa30tQo374e2Livp5CzhdugEUot8r0-1769177756-1.2.1.1-r6wHOrvRs5MLU00w8mBeiyDTFKMxZMSnqTtw2TLhQmE7vdCMqnLnzNUoOjVzjgEZ',cUPMDTk:"\/?__cf_chl_tk=U0b66P1UxTA8ADzHmxuLA6Dvho3B6NyOVieb2IzgD.U-1769177756-1.0.1.1-84HiEhRqgE8pk0swS5ZvWvSE7PQ8Pz_atFtXF1J0jkc",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=U0b66P1UxTA8ADzHmxuLA6Dvho3B6NyOVieb2IzgD.U-1769177756-1.0.1.1-84HiEhRqgE8pk0swS5ZvWvSE7PQ8Pz_atFtXF1J0jkc",md: 'kh_6Wrd8TMRuRj424.llxoFZkwAOR8v2YWVwKdvUbxc-1769177756-1.2.1.1-RSztFQEmM8maCpkefGmX.Q1QwoQ1lu5YHbLldzdHCs1x6JR.Q0LOQrStgfeTi90RH7OD1bW_O.ii5FYqJvelGrAbtPfqH2J7ZIGYUYkWwTfcO2YBfbM.bSDExiTaxvVSH4.GGaW9VwKNJkFY47EOuJcRivbr2_uh.PQsEZDUchJslSYGTMmvvE3OBOiHCflZ4e91GIvnl8U_rMmUXHiPAdIHMRZ3u2xkmKf26iUK5sUUjbufkZd8Dvk16mdiFIjXLB9ZuerpUdDaQBxCTcRcrCEZ.lj_5uSCsD4NH1Hh35KJV2oEhV89sEYFq1XwNKW0xnlKCAnwXCLcKJLDd6qdo.5JZPznEUKw4cwgdrU8HTCjqQ.TCN7mg9kxwRc5p3AOW5TJDgdyUru6yazywLJBUbhQU4ya4xh6UGyIz5rmpKWmPw2sf9SOP9ZavUB3jj9pRedBUhRIOA77AeBRLoUw2cKC4IzOXsQPRLulI4CRRos8huER6._Tfqk.GjbpTHFLMLRKRs3nFkba0Ibxpfx5cE4LNIhMcHexCNqRUdy_EM9.EZ601dpsq.QMrdEfCWRjLXHW4q6.1IjgGCTT5e5QzBSL0nEkg_Box.miRDi9z5e2qhEwUbfwH.djKw5WuT4xWV_sA740EWSmerVG6omUKjU2oUt9Dj4ju0K.DcgAIVMiaoHbepwzuCDsVypNzaF_O_V7SqebLvL1XHyWrqx8dUuT5fqqguXq4tio_QdJrDntoqU.mZm8WA_bv5RfV.5QJB_inW_8vHBPZyVMhwS0QlV8nTls2ar8bPbm2aMBp_jrKu8T04jj6mjnSl6sxh1T77CcVudzCyJSNr9Oy85mA8QlGRH6RmVfCuR43NYJsgU409squk5_b4S1QbFWPxr.slH_9p7ASuJECEnNfI6rPWdZ6Kl2zRoke2ucU0AgPG5nJfnxHqGcXgl1q.g0fDGAnyeQtQ_vSyFKqkAR_6sQDxYaxN0.IPAc4LhvCVmxPK8',mdrd: 'BsAcb4.gvlym78GrlUWWQSjT743cwxm6qe1b4IuV41w-1769177756-1.2.1.1-cv_G7KWHfQ64jfH3slYB0siLap3xFG7exD2sj0NBuZ_VC6ClXc11vIl1gTsr_T7eAUhXQJ55TwU8NxFkYTJr1eST.ikNrKGHzwAM3RRbGJxYsH5bpj.DufhzqpNE5FNtTDCcuwEfAoNIqPj9boTMcP783ZfZtzMPMR9yXks_On5JdlnRcoNaeGRWEb6.WQHebDJuiGx_FxXoV2EG3suHj3LlkleDhSUcZ_DxYXUcSF_0XJ2QXJat_mGBXaKSc5WDc8hSB1QQskC1OfysEtN8BEuhIHgU_Uz6HocOq4VMrZVdkBpZmvZ4ZxRIDYEcTpjxYA.CujMZMrHXYryHNIKoabaOJcQ9FgjWITMpzD.7Gz_NByKCkescaxFpMs9J3MM_BigAHoeYIiRXJMqG
Open service 2606:4700::6812:7b2f:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f2e8d5d3a8"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f2e8d5d3a8-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f2e8d5d3a8',cH: '41vTKyYPiW5odi1aIRnq7pQvS3VU6momitG3Sp3WtkI-1769177756-1.2.1.1-cEn5tQfywWZmCU96DmZjwaA5T.DIEgWrBQ7SukriXPZqR0xVP4GQkUSUUP4Dn0Ms',cUPMDTk:"\/?__cf_chl_tk=utm7PH_d4X_3jjlZXxJaMRxQCI6ugA6C9P086jqgaUw-1769177756-1.0.1.1-NhVVRgDXZZnayppsnfteJigkuU_ebHV51SPCChvskrA",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=utm7PH_d4X_3jjlZXxJaMRxQCI6ugA6C9P086jqgaUw-1769177756-1.0.1.1-NhVVRgDXZZnayppsnfteJigkuU_ebHV51SPCChvskrA",md: '9uBlnMZYh2PwiRuKF0IoPM17I5F2TPw560EijAt4o3c-1769177756-1.2.1.1-mQD7krVxPcAvCkVhexAMAzAZOUC6YMLj7L0VFy9Y_1ZU5.mRk8Be8UducqyjW5axYLmhHWqywpNgQjX8ovTBCMkXC3YY53Ob2ynKmQtKkXSNoW80MSMYPlOSNe1kn_OrdTnxgRuKT3FzyGeOTKz9PgsNXvWFU__OvScJxGrh6kHKg9HjfHkRyaItQkmvd26cB8LZsZcV83O.Ok3Cpo1r9Sqeh2phVZLjxiJ2gvzWjyMTjJUzRrxqP18ixyghQ9Z6SODZB1A9v3B5LZGBJX645U9oYPtrS1iDx9KKqs0DY6nwNg.WJOxOopksu4q9RTTlzV0aRRZuI4PFF29OmSknjK7eq3Qyicrvw4OdulQ6L9f1woueNdGSCvqY7tY6kyJHTKNY2ow6pyedvMAQe58PXJvcm5BtZfathMKcdgxbeEoQatX7g6WXkHAqaKwXLdp3N8Q27PQ6WbQ4jJTD.WabRB8lslCRBjEVf0AeQAXX53SmRNoCo0ledDLB_H90AKgCUuGJ2vdK9y30Jwto2PK8pVo4snoEBNG1xWkfiuptG1FsCGAQ_YFmG9ERb05hzz34QZi18dsEj1hQl88wnJgYh4o5k6RLb6j2MiaWd8UiLG4Tz53Zd2ygt23qdJvFCEysZXXjzB8Cm1beEZg2UWN6xjRmkf4RsgPg92cK_8GxnvCB83TywnX2PREWMBcZB5Wg8dib54FgL8dB8PN4tKW78abfuTQOzmVL0msGSmKrZwpe8Nv5zGt.4rEWWmuqYXTJySrcClOFHNT0cAu3MzuW6akMlMxM45fuvZJBHugEwBQi.pUn.A7CCLo7CL94HoUtTr7SmFpKsKSVfK7DkAAkYk31pvyK5fwRI5SDaRVSS1YV9466KsimqCXu9DLB1VgoETJIohUozS9L7KMSoaVk2wEtC8YkuWrHsljmbt5xqPVHTIZ51KTYltB3kr1paLVIZcnuQcJ5wnZ7BYO.bMWW.szJf36PEddg1AjM_Xx1jXoV.dAQMngr7pMViBGpD0yDWotqCtjHYayakr0.uXrd5w',mdrd: 'DXwG3fBZgO8mEkMzqhYFCAPE38HRK2bbn_2x2llwNfQ-1769177756-1.2.1.1-f1JSgR7Bfk5my_pj7RJlIa8yRfyZkckNCI_7BoDsL53bX6TGJFx_JSXgktcWxvC26blnRrtCluodgGZ6ZBJLZYLrGkMNFu2qmN_MhLY.W3fVFg.cPoA0NNvm7.Yy.GBx1s.xepaLjiQpbgVJWMlEwO2pn9B7eP8qPsC8fFlEU8AKI9HAfru6h8A3rCqrsDpTc0i28LjLGaBZuKSy0XV2OCZF1yWdDXfuCbWxgrc8qBzC1VhsnZAkjJ0KqHrEglIsckXP2ZA7_EYTf4qaFidtiARAoAo.gEXnbkCTp6HNvrA3sBCcVXGo2DRmaTiJFwlCW18PGgJ5b6z2n5JXTBquOQwrymFkmavxiuCve
Open service 2606:4700::6812:7c2f:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f47f1a2908"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f47f1a2908-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f47f1a2908',cH: 'Yz3vKKxhKv.HjTTkH6tLJ6LeK3ovPOgP8.LZZjRJXhQ-1769177756-1.2.1.1-DSuz2DqvIoXp68jxkFVaCQMCKBw2N_unHrfakJU_LmDq.JQFOJv2PY7lBydYc0zX',cUPMDTk:"\/?__cf_chl_tk=YMZq3xCL3MwuvGuu8f1Rlm0yYTiBNpE4mg.3UyLgcqo-1769177756-1.0.1.1-r2t6UnU2IxDDoyAxKkrKAdmvgoaqPSwa0pYLlhIxuSs",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=YMZq3xCL3MwuvGuu8f1Rlm0yYTiBNpE4mg.3UyLgcqo-1769177756-1.0.1.1-r2t6UnU2IxDDoyAxKkrKAdmvgoaqPSwa0pYLlhIxuSs",md: 'BSE4.dS4S5Ul9wDD1InnghQUWUdONpuuNxGru_9..OY-1769177756-1.2.1.1-BQcWeNSsKXbYAfCwZl.hMWWE86KDJUUfBINgg37Q.92r_ZvuSsuQm54ie2iUp5kjAzS7RV2m.5aXN3vPm_bxtwuKCn9iLF0pNSrtkOh8YiHdJBZo0BC7Kr4lctqxIiG2dVVNnw30TBcGy_B4OZcIwaEwtWIlD.Uz4H.N0DpGaCsdSMrYrY_d7omxktrGlA.hPvSZgjecp7BjadT7IrG3tEo.NHgaJ1F3egsWNzKHIJZyBKLJ2WA5bRITnjY4dU_.zWoMdXObhJ9kfW0a2KAPiSlMQaRIqo.e.fs7ETDot9jIbdBa2suS5MmFnrHumFT3mLj3yU0N8AEbELSbcQnfw2LL.ETWCSgBmUhmk_GNNwm306WXLja4ziRvh4tBpjID6F4Ulk.HetFy1lRN44fq53Yn6kmDzev9Kc8KaKFbDK0ta2IFEgCbDopGGSpRj3eleTEM5wD8ZfMQSUECFzmugsaKwYB8fRw4Ghpn6XmkKKEM2V9f6QslJL2LoZpcR8IJIbrr0vTlUy5d9FBa8NBkG8BNvkRkWOFMKwvVGsxnMtltTU0DBgFFB3TKXr9IM0.oOkC85T81CxdMZe.ZOb4EkDMQDHyrc4hGw4xI2gGCewjhq.wfY2Cnj6b7QMhFgiSeh3hxdCyNLeL9QraZydmmf6dBOVjJl4ztl_x80KvNaKo3qwyFrjaoMjLeYa4xSuMvXQ8hvzLaQ0Jb9CML_DijlTX4IEUCwI.BsiOsiSCyANwDyOqqantxAHMr_oNBvRy8y63hVp69UDNqCMfYBA6TQPrTLdPxKNi1ceGud7ydC8DVyFipKwU6HasE.xVpbizNmc3mv4QMRGmzGYCuFz6UKkkEVEC9mmC481zSFbLRTBHRD9LaB8EV3y2kguIbfkK9weNBiKC23wAMtEjQHEYIIgphUp7Q4WTRHYUw80wBZDPSQyoe5EhlBUcKuTf60oQmaM1d1GySu0Pvop_E5Kbpj2AziP7IgOER3snbPlGA07mF0nT6Ic9k07viKsGGnMzpVrpoBt2ePN4y.HxLVeTYmg',mdrd: 'GVvu.QCXV9HdDwuSnPVs0_oMmrQVHzKTjuZPK9iwyhM-1769177756-1.2.1.1-0z0wOt_v.hEZLPZcQEcWVTY4jzyDaG_9swu_gmV3gTkvvVO9UdAVsdBMX8NcDajXDBG.1qVLRqLAQ8HF1SbST1RxvzNHN.gsgT3qPNhG6Xq7clA9cv69IjpUBc95ethUkTD3pOCjjNE2wSPvEkoXroGA2IHxJV4VAQ7I.iF5hswqt8qVS2Yl1CgPpCFyQGZFydMIiTKtkUjPs0ezMWvjBKnuRXBbqA2_B8w1iryGpumsuUvpKD6rhw91H9oe0K1SKE9dIijZbGZnknyIz97V5ML5xAXZ5vXqJf1LXXk4kVgR332Bpvj_0h7lQB_DkzBF5UYTvZVHEfWOva906mpcyULa9uyHP3E0BC_Cj
Open service 2606:4700::6812:7c2f:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8695
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f49c779deb"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f49c779deb-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f49c779deb',cH: 'nT9YJ7Kur8mq8cE.v0N7Gwfl.L7AQftUZoBw23vq9yw-1769177756-1.2.1.1-QxiH1s3qCDQxGvJeeeN2dcmILEkUL.DiSx1ZTFX6LM_czgr3V9cOA2GmzbbmUdSP',cUPMDTk:"\/?__cf_chl_tk=0gHXJLjNtpcHZw5i0XGRT6WTH7FKhPuS_yfmMBF1Isc-1769177756-1.0.1.1-Q9BBA0dZOn8SwD5XlmXPxmsEdfxIAUHYW4w9nS7ZG1c",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=0gHXJLjNtpcHZw5i0XGRT6WTH7FKhPuS_yfmMBF1Isc-1769177756-1.0.1.1-Q9BBA0dZOn8SwD5XlmXPxmsEdfxIAUHYW4w9nS7ZG1c",md: 'YZlC00MJPYC1kbDpMLhYhyWCnrtKb6duA58kgofi_DU-1769177756-1.2.1.1-iY1NxCo9u3fBk.CaBv94k3d7kHcfdd7I..34Y0HhfHhO7LscPHxSSQxc7lu.83YYlzYuRlTfn5xwiQoDuCN0jHf64L74zpsgxG9_8H7Xxczsx3rUVhZN5RPoZzi5KHdx9AT.8bayLYiLeCYDkynvCCspg413HovDG99sTT61NMNR.t1SNGd_h.Du7QhwXY3X72llQGzZoInF50lZ6UUOwj9r41lTI_4SDJv.92RzwU0inLKOgHFQgnP._cZaFYeW43zRfgf7IVCeD4iOWC.EKspe0QmrK0wN6T.jvC8krLtfTvTY0oONYwUvt0FEO2H6oSpNxuw0vYO9TszcVDIh2KdflCJ2f5YfufxNGiPhV5sPaYF0g9_CE4lzbIjg20E4JsQRPB3ZtiEgZAV.uk4uiv6.utW6WmYK_SoqPi_ONzuYLW5wGG3y72ThMGkj3gLTULBd0n0PunnHLJ6yEb_pKXPza6HhscDxFAxPUaBBNL_IuA1faixEBw42YjqQ0Mo8LLAdTKgNXLNY9.YZaqC8NnBiYHVCBFv5LMd2iwkZb1JSjR8fTu.t7oDAsvpnZnihOOKyG2ci2srPFKQp91trRlgovOUXemYMgJXJP6pbfyevhbXFifmgiut0PWinJ0ppYngVwaxLOtk29stlJRa6DN2_DsU_eGQAvHgqdY5DyaIO7j7T3xX_o5zppFR.a7Nw5YpLfb0uVdhxo0BUPa7VursZxvjuO52FlVGvzNsZQF1CWZ0YnQuTr__PGMcGYalE1Q2ezAWlkBW__LRKCbBePAZOlRgOtZm98j0eGpR5T5RB._o3mGfjQdjQqGYzf2t0sFFIwDv94Jdix0uwAW2vWnsDjeqoW6_900J4CvuZKG3Hgba6OWd9k00iDq6Ppk4kjOztw.MzkOwzx2Lq.A8ml5vQJhU6.4RxmJ_Wb6a3Y.5QkzMCvCusWEnAteZVUqfer.4LmlQNDwdYyWS7GNCzMuDRAydHWhBale74eS6GCevg27YbaBP6HWQGvlRaXwJuV5jEgU0e_S3hTXHI7y7qyQ',mdrd: '.2yZs.xVisUaDusx_driKaHOjntgE6IzKozI_8p3xaU-1769177756-1.2.1.1-j61qoCk4qchCHndpi3xf.4XqSaUkFZqiDPZgmmUxpAE88uKUijGMP9_rFndro2L49wbm0p6E8kD9ReTqOxxGRTbRbw2il_ev2Mk8bZhA9qkOJBzYBjaO53o49TDaqGiirDBYRk9_QV4zrkiTwjCZw3SZBYxt01cNSJaU_If0FJxFIAfeGGWjMuaag8ZNNn_EXe.02am52zPt7mFdpFN2xVvKvWU89QAYp_LMthLRRBbK8hyFg80yUYiNhKf_x0COnXxS_8Hc19SbsIAYEE1afPRJnkJ7epkwbJX0xR7XtEmKhzKEhjyKQSs9EMXR1iCQvD33KNVldB_vjYMjZwkVezhwCACaLKcOG77gX
Open service 2606:4700::6812:7a2f:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f21ccc9cc5"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f21ccc9cc5-SIN
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f21ccc9cc5',cH: 'ACmRy3NJLV8FQhBg9hAxGr7vVnEGKZ0Wk_Qr4djoRIU-1769177756-1.2.1.1-GF8glfgmTRmdTGBdK5kQUYxc_2is6p7JnQDchgNqDW_9ASW94NdYwo_7guvWijNE',cUPMDTk:"\/?__cf_chl_tk=5RETNE9r3Mk9dR6qxYA0MAcbzCB0xMvj5_hXRRHw5sc-1769177756-1.0.1.1-DndGToRsGo2BUT2v2_ulkoEEoduxYNeDh6LZy1.t83A",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=5RETNE9r3Mk9dR6qxYA0MAcbzCB0xMvj5_hXRRHw5sc-1769177756-1.0.1.1-DndGToRsGo2BUT2v2_ulkoEEoduxYNeDh6LZy1.t83A",md: 'cczrBhewI5XjzEyh_zFwibl7h9CervYLM9vqrBc7Tnw-1769177756-1.2.1.1-td3mr3GrH6MOxrFVpK9dwJtRJrmPvRfvibaXcKeeTzs8f1UAEpmzHSE4NTMS1Pl3Yyp14l7z8rBtJGLbguCgeugUTUmNRr7RRfuXg4e8oKXm7FSMl0Ule5pzSnWhF79yse7iBcHAz_lXrMZ297kU4PFWh7r5j6GqsPo6Feeekh86X3yyokRYCgCvz5MGRcT2vmS7qfFavJN4CCbAhApWCudMZXWvkwnrVFdh17PBK5FePrPRA.0SEl02IYfIZW.wBliDNguFl9tiehQyMwe47W8H4hGuIfaANbRuI8CTmiHLZxt6T4mYuCVjpwm2XqA4O9MFW0SrSNTOW2uwQQ8lVJN4TmGjGFkrggJEoSHUB.ScOmB4IIsldgtmAX_KWXhsaUicT6Dk4STeHhVHTTV1OTcCygvMfKrMq32z9c8KTsdsQzpM3BzsL.LrksXMY3r2FeGDbdcQrJL0eC.fAomnITVPidYy5qs0Kw9RLOs4XvEsuJixHhjAINEXL8tlGdJ6mzMp9gmfhMLCJTJBjOzp0r7GXKK7QGkgR4ULQSesyS0NaR6PC1tbw40p1bHj8vrMPcb7ln_lZIsFSkEMrlk1RD1V1QvREJPXPS8PYIc3FvJJE0agI09vtHta5uVePPRANjFzGa3AMUhSY5rKnCePlK8jsMP98oJ6Pu9unjWfBKh2VMCOXn9e9RMi8gidZUBTKr46WLlALW1bT0wvvweZM18ltp.XTruDRCm2QHzRiV0oCXZJLB4PyQ9H9TQXAvKIkeFrmlCQoBCcGBe5770ZL3zNZTM4uLsabqUgMekXBjAz0d86nQdPbJHxBOpXhHkxy7PCoxBglbMOJhB4Y3leqIpQ2GfmfhDGP9rNMSFVixO.RvDLLvj440IcHPHmERPrxIrPZ3eD01l_M8yZM2ygRV5U8sUAu74JfpnQcFgkrjslAWMYWevoL2DeOQ_tTPFKFKapifCxIzBB7DL5WxUY5m1PSL61gkkRrSAh7XlPG2reBGe6MoGACdK.p6788shqDFJ5uW6uVwBB6hMKGAlllQ',mdrd: 'G4ImPwIXDMZi6LQOrzZrifxs1JU3XbfVXsKLzUOeofE-1769177756-1.2.1.1-h_ujaNzQ9ftCYNs4RiCcKAcs1nFX4O6KYPHFm5.wGZjZl4a_mUMIEffV_y6GARWZHyY29ZtcEZnPpA281h4k3ot2.O1mtu37WR97bwK9llCbBJ7wiQ4AwREOHv09NTgH2N.glxUfwTAsbcBKUO1Ksbv_GmK_HTCME2enmDAFj7I1z5NHrNTzYQrGs9g_48yPnpLRaoCWdlAibtaQKc1FsTKIIUikbX.tx2LXjeyB.LVtlMBC98yTQTpHrGEbOuaZNp1mLq1CvDEN8Yc3ClclCabTcTSA6mzzbRza_Z7N.bYlUFF9VxIHZWFAeVh7BJyJdckNHBF10WsLsuXUsre.LXk4gU41rCMUksxaP
Open service 2606:4700::6812:7b2f:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8695
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f47a660e86"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f47a660e86-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f47a660e86',cH: 'D7cJcvM10cln2w108MdPsX1PBVu2Wlz7ZSedOxA32k4-1769177756-1.2.1.1-Won5qp9BTrIHLLAMcjjJiSnOrIicDxYsJn7BdDZfCTmeNe4blJQKxp_Z69pL_Xqw',cUPMDTk:"\/?__cf_chl_tk=d0fx1honfEv7k9kFy2sTkZ92JUqwQJFQBNc82iJZqxI-1769177756-1.0.1.1-.cw.9tit9TFw8BZVSdaUx4p.8QLHZ4mh7oFOPPJGvSE",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=d0fx1honfEv7k9kFy2sTkZ92JUqwQJFQBNc82iJZqxI-1769177756-1.0.1.1-.cw.9tit9TFw8BZVSdaUx4p.8QLHZ4mh7oFOPPJGvSE",md: 'diS9iSQ9764iZZUnzTPAmhMO2hlTQznjIKPHpneA2a0-1769177756-1.2.1.1-FiadLt_IB6p4doR1PzH45k1lq10P_UjS12mHsVWUFJyxlqdliFrXSpMuy2jE8CIRpAX7727VSFbMrAPPD3Bn9WmPxlEY9GPT1Xg87bogtSNeWZ1W4KC9CVs54V7wF29AKMkKlw.eH_QLdtt3ePVlJrc4QGegIE2MO90cXQ2gfAqhJY7o4nPUfertf.wmC3AyGZkBiz_.5ewT7k3oOaHCZNVFa7WvEPn71bsPogv8FF9T2wtkzUFb2lQZzNcOpHPXpnFTPSgJRReL0p4RiR7df94TKCauNq0YKqrSg6fXMucMW4C9B5lCMb.qNsFH1YyVuqxyyPT6xRL2OQYqO9nVRo79q5MuXUoL4Nyi_zhnVoeIFxHBBoaULEwlNmhZh6BjnJMbyAfO0ifVS383H8r3BFW9nvwfH3wCDSp9FBqGVXpaQzaMSqlQh46ZFWIWF6j74hgxGSo7sHshDlL_PeWzzVpQDx50kONKLkrVtxaqviKPIGxrJHv0X89IzbjI2eHrPPVsx9It5raKMC_PgCUKVPxmUyGpGY0zkQuH9j1qP4Ak2iVaJ_cpO5mWS0psiW48OBEL0pYCC5D3MzfdgPE3sqiC6qfLiS.AiTC5.1vVCLbk2x4w8mbWYg9.cOkX.rbnSuFiJ0enG_v6IYyqvv3vdPBaPuyAVALFOsrJVEBoAeWdV1eS58o3UPO19Qcs6mfqK2TKRSnG.i_ecG2M.ArHjYcyKxBTUpJhdVGDUenxIpLHsxJ8tykL7FsokTD2ClgjwajwtPs1FOhkzWK_sOAWl8_lGZJybxv79VNwb4HBcc_joZwB0c_7bB_OiiIilR6ehQ3l21jKlDoeyS1O9VqOcaL1WHuaGcfBsx6RqR.KTVstzmANHd8VphEQT1603dGD6oJhgwXHlTGRNeWIMLBXHVIXSNuQP11Lm1u4DDFaduwqMnOdvg0zBjRcLlAUzcR7Kak4utluQyZ3HHSl7QJj6Ay3uJVYDuvn2BDSpBCfoJJc7K_X92TtRkGecSbdqPIY.8PN3gs48CoEh8GewV0kOw',mdrd: 's5s_ryHT1VIErHn.uTcqGpxeUj4b6LJMQrXKOgs0wOU-1769177756-1.2.1.1-_A1hSW5sbi_GGwnb.glRTo3u1t4foqz1IWkejRq1UZpGgE7_S1UIYGSM1cmYYleRE1j7TUTsw7.sV.bb5M1x6nqOdfnrVfHKk9OmNxLnwb7yXHkhFXesO05Kint7_CDd.iig5VcY_bbREEB_XpytiSc4x9r7QiHR8eF9M9SmmIxoZZXO8AGtLvHAgk0xjNYMm7RwlAgxLH34sa_5KujXXQcp4fnNGEwUtGOXN2gtOxdmt752gkJIRei.KJdMpRh.yVXzUmvobOmCls3C7WJ.0thH81itJT2BiSEOMTYm6Q3ZA01bDG5eAitDR6msU1VNrlo2hMBV.kLXdSQbc3laFiCPXKqh07sm.mRtF
Open service 104.18.123.47:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8630
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f1cf9a0c7f"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f1cf9a0c7f-BLR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f1cf9a0c7f',cH: 'GdTOl1OqRdCchVt7YC4pnPOO8rLbxaJbwPFLfDdUaHM-1769177756-1.2.1.1-MbUPXjPlrGBIJ8OitG2xbiLGhG0S4b5v9ptLfPXqweuu40ViA5dhTb72sO.Cdodw',cUPMDTk:"\/?__cf_chl_tk=0Irc_za7JslCsncM11LzM9DG14iwrl3GKPk5hQrZVZM-1769177756-1.0.1.1-JuDVHehnwiD0jvM8rktgnbdGpURz3xlSAh3NKo15vNg",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=0Irc_za7JslCsncM11LzM9DG14iwrl3GKPk5hQrZVZM-1769177756-1.0.1.1-JuDVHehnwiD0jvM8rktgnbdGpURz3xlSAh3NKo15vNg",md: 'N8HoB96PeN1JPS6FzrtOOmm8W_hSOvnlCgCNv9Dfqn8-1769177756-1.2.1.1-7pfPxo38WdZoRQfpTK6Ghwc5scMmi1HG0LBXDTz5663qHgDZI8kuThMb.1gBNyUI6wgzTlIzDn1.j3OK4sF4pBX6LzuShlYd8MJdJ9Yzzp_6uzpK9hpvPiGQP_5nwocJhBlryTW_Waw9vC0Ces3QTVYt_CMlPB09JJuwQ1WVouNMJYSQeITygJINAXwbaSJOEEFWlp_xW8NGInYDRoUM458b4iVIcbhG93djZdSqYMk89gYnrIp38wjJsUpJNQBoTKWfaAwjTN3V06Re_PtFSZRUj7dEA1D7cRehDrKZwWQrFLa7J5IRUpEN8JOUmg3qPh4M1khS2NPe5NweXtJ2shYijG1OHHjSwIh83sG1S5iOjGbceVlvSJm9tnWwl.7.mWkoP5BMbH7YcQVJsyTh0Zo8vy4aiG7QitJmH20bmIHX8M21wzbzJHL82LhTOKXGuY1wlnyStsT6cwM8HPObrchA9GSO1FlUrhuXlwSc19a2qzx7aAw0iYO.CNh1K7ACd7y8mVvx4uLhrpTa.bUXp7JUrpXLng1EYHRmX_PFkH6Ou7VXpNn.ymw5PfpxpW7b.SPfeSwixy0GHUe8WfAqRqI.RGLMeTmliaGdNkMnvYEkWky.SeGD2_pn1jjXcggzBr6HX.nYv38LUeLNH_HwlMD1w3ltt_Ds7puQC1q4q4MhujGCx8WLNLugvbchXFqDsiAv4R4Rs0bIG2AAOn2FyXulPAx2_YmJYzWXQ.Ax36SCRVGnjopGRbLrxfkjJZOktCiwA_A.oKAU82QOQpMKY7c5twLb2BT9XGmbpED4y0JHEi3l5gSsfDqmFMkTE7RNIJeTS9Hwy9gtdie_CjjA_SxfI0zhNWsl4ozJQG0bPW45qUv1MdU0aLrZbN_1nwmu05yw0TVp0JjaFzf7y_JJelZpFLvfrHN1eBDhB0RG7G_80jYOqYvTMPoNeVeSTno7cFV3NenNXb_5NbkgKmbfarxQQt2v7MA1lVhch1.6iTA',mdrd: 'fao4Xmh4o0mNCMYXgZ9zRMFOX.h8XI7y_8mZtXU8DTc-1769177756-1.2.1.1-3t7K_5WMdG1u3FpqZqM2E5lh0.0bVq.4WyP5LsMAzH0bbbryglktTPRylQcG1IMqNwc9FXe_hvmfdRSMdhYSLsZVQpy59QVfn7LCJo2xAehj2.VE20_l_UpS_jBcRvpgd_7ERvxQilSBflrB.uEbUXL0oSurLjs5gxT0bVyuxS_0mXedCEQ8Avc71aBkc54u4B2T8zPuWdLD0yzwtSZPHtY1wzbBJVOySo19HRVYNWujeuUdPgcbpvIyVZu6N2y2M2oqlnBCkdKWaogGevXH1c1f42s0OWbpk.HwcOGqD.vnmIaVv7OsSf5mZ.uJtmNO3RQ4hGt3RQZj2RwLnhqMdyd0PzFwKrm1hGG4I86HVRHsXp.YP.Bte0LiemJhd9Xa2yWJYnR.jRK5xOkC
Open service 104.18.125.47:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8652
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f2ff864ba5"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f2ff864ba5-EWR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f2ff864ba5',cH: '6tUM94SAnut3yD_dCNbMDKv6c2zDPTGswQLO4tZCibQ-1769177756-1.2.1.1-UUahMqM6OGAO7mOltn_kDv7YgtS1w8TakFaMOn.iFIg4J.9TyWOJ9p.1V6xTCkQY',cUPMDTk:"\/?__cf_chl_tk=qfLv3VI6UMnv16hoJiJRkzviOJorhEpD.T5GeZZr4Ek-1769177756-1.0.1.1-K2DCd3twtG0l5sdVeqch18YU1GjUYgBCDBMBcLQNQgs",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=qfLv3VI6UMnv16hoJiJRkzviOJorhEpD.T5GeZZr4Ek-1769177756-1.0.1.1-K2DCd3twtG0l5sdVeqch18YU1GjUYgBCDBMBcLQNQgs",md: 'W2fy47t32qQOUMF6RkQkBufivt3TVONiP7ew7CuVbfs-1769177756-1.2.1.1-855Y1p1dSxjEaVqO2JYeBt9keJhNlVFXmOTOgiD7n0g8rbaFo53Znk1W6iJ1l4554tpHiUFUAG55T_Xh8h4V3BUQnLnX_54RMqfTcGJSCUtd2gu7M0QjAVijYXOtb4LQbDfKY2a.Gy9BA6f_jAMEUdc9ZjWHHDT3U0ABpALQ4dLgU57ZS54_Osc3hiJ9nZ.A5y.4WmaKhKn3Fjpd7jd6SXE_3SjBn.92vbZT_2v42lBB4tuBtcKz04yrX5YirC8R3kaEJzZuWqVFd8o21IVKT1LsggtPo6wLlbQCWaroWAy5VxGzrHSyZ.jk7CS8Bz2ua8Ee_6GqGoVz9k0ipcEHq85XCNG6vJZBC8uzXz0pRuTlSUROIaGb3C.36IG6gXsugkKbu3fexn.pqdF6lqt8JLBmz96woXLu1gjJhp1sgjjXtuhHtGyJeRkwkKTPcX7yjyZ4JgVUJgKE5.xcpFyQZGFGFpBadrZnVV2uFLtrgO8GGR7cWKlkhWwrzbYMSrMYpP0EfE3WXdmylRvGdljMwJ23zFlKiTwfjyblkqa_MpIJOTpvhq74jpHUi5uANVvfasJIIuylL17CD_1Vlp1CUQEtjETs3eQqc1KCnHlkoeNEbP.6l9zDGp_KSUKPagZZMJimilyXgMbIuTmFL23HCRMDd3CZaGIBE1gqgHaOETjfMnUfNliaIPauw7k6DiLp5gNutDxwbyqAsQCFJ1.24P_3f73bFxvc0sJLaWAgrOuAk37BV_J.xnCZ6F2Tdrv5I4lylXrmmWKD5ibw.8jehr1LhomB4GzrtV948vI6uzNCeshtsVRiSrgPMXwon2Pc3WOM9.lofWaMCNvnBYH7nPgqELfearWctVDBJTpJuP7XfDZSJlsbjv4Spqq4T30FqayR.VuSJIGRjfctcJYqwbJQD2yaUSukMglZfRV2epUktuM4Gq3fYwhYNSnQOGTgGHJ195Q3LXocL6mbBpYKSwkV.UMNkxJGKQE.B05VbsM',mdrd: 'NJmEqAJmKcPrbKdk3zsdEVGnjITAziA9O6MjIx7bmr4-1769177756-1.2.1.1-TR2hvv7kL9ffQrmwEr2ESS8NM7Cqqxx7OjylP9SSM8QBv3z.4QumPuEd.KlEszUcRg98.wUddfsbY4aRpZKT5Lvnla0_qrlBYTk2IQUbGfrOHQBw6.PHRfb3XyfZTqpfa1GtVPvgb_Kr4X.4lO0F9u344haXuq0Quvd1TiTrxOc21m2HYFOLVGjI9XlMmpY1O3I4NXq0XTXu9r4mCgBIc9UbkhcWXWXtc2aN0DxqUUwSKCJhuCRlHuPVyaJPS._oI4gqOxfooYPNcuOAz6dnkH.4G5B3u.ltltLFxG6rUAcS3t6yowylvwO_2t6V.7efhoNNvghawQxL0cLiosT9ZKq7AJIWpgm_CSIbsshUxGcrYeTsHXeS5nSt5cIz2gx5J.8UEM8a0w0w1csc
Open service 2606:4700::6812:7a2f:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8716
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f1dfa4d384"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f1dfa4d384-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f1dfa4d384',cH: 'Qd3mp8.ewsOBDzydeWQCF6CucOf8uWuI5NMLQlxB3sA-1769177756-1.2.1.1-rlifJtuTefmUoMiQrYQ45OWCV.bwFa0IVbxkhwX4GUQwyd2WJheffjy2YjPHfq40',cUPMDTk:"\/?__cf_chl_tk=n7OLDPNjaEtb0.hZgheLOI4X7xvjZZ9.Gp3nj2Nkn4s-1769177756-1.0.1.1-h4Hkki0.ebjQFOu35BgHIgpaUG74q_EKMSFNMHBX3XI",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=n7OLDPNjaEtb0.hZgheLOI4X7xvjZZ9.Gp3nj2Nkn4s-1769177756-1.0.1.1-h4Hkki0.ebjQFOu35BgHIgpaUG74q_EKMSFNMHBX3XI",md: 'hFO58JzSISNwC6tfqXWuWps1pmBGk8QdR2D72d.uV8A-1769177756-1.2.1.1-m2voG.jXnakGyJ1wZKdXAeelwH0lz87ho8kOOuuDrf1Qcg0VWPf4s6Nl6fj1gHqEqGmiyI30DpWotyQTFGm7r7PVb77QbPL2gX8tgVbRiPoTSwuuwiZTJkXFyvcFgyal8pXTFukYaI3Zyo0JtqFc90mmVhSKqxM1wIWyz.IhaZEcmEDr0h_QTZwJfeKII0BPsPo5k6q1r7hj6qROMLmbNCrvNj4r8XUE6gP95tcKk6KT4yQwghSmeX3qm_vtbAlzxQyTUM6KkgV1wpbFsgcUqLWmj37vaTh9iVbKxcUH7CicIqyjBd5ZO70UodA_E3NyEKIeSgyO.F6TKjCd702Xfzs513StR1H81LPFQkMwVpw0WloqBG6lcaayq8RWElAdDph.buzSa6W4Ghsm3vtKjk4R_LqUhQEZswzDA9EOqjxnDEYB8ODKOC7oQq_DxShUhTGYYxTOl32N.Q0IX2zaEgWFHhSXxLynYpCESqQTkesxqO8_EiMOtVVpD9ENmHcpBEX.TyFAXW9hAJhg64K9r__gHQVOVGzi.qpXj.KoFpwY36fnwAIXYhksWQir0vHPXN7vzIfsEtf08UTbL9OGqq3JTWQN806N1C5cysr8vlXSI15002Rxbxp8Kri30TDI.dUiD4T.uWZH4.ulBNzkeY4R7mtsd22fyz.lVgxmAFdz9HZVNRFBikFw2AVQ5IUL4saw5PBpoUmtIknRcN.cOk2sC2hqpEDp8LxcFOWvCgYcmivAHwpThwr6N52MFny3cPYR8Q2hfJp9glUzm6O.hEjP8kf_sj_81A.qv9OslNxq98Sv5sUOoigKy1wz54lxTGdD24mnuK0A4PmMgHIW9_uIOV1ueFfnbKKsXFPN4wYpgdpLfOt9ArT9lODUBgVqnM7hxSq_B7z7mlPV6Vy4uWIuMpG2EjvYbXwrwDfpMsni4UB8xTvYlf0CeLFvfmqYosx_fhqVoeHIDPG93WZaBwRNx1dB0_Tri6mOOvhYFgMgf7a9qWbOXi5bQGJfjIEm8DBy2jKi4ung8S9.C5Dnyg',mdrd: 'JnNKign0B4_mu7DiwIAm9IRYKD0CFrrUxoIUxMUT9t8-1769177756-1.2.1.1-zK836W6AgllSgXrfNHrjc033du3VU8GNcA5LIBRm1QQwAegja_heDxin7mkTSG0T5LDouQEqI5iylL1l0Ed0bnVVl0NrZBZDvKINq31WFj3O5cwYdiew7oeKjTqyyKQiCvcCsiK_6DeyIGOWe.OQvP2MZyZqTu0umG5q_ehiBMsxxy9VM4L2nuTmvyRlcTc8EWuAIVOwR3LYvq.gdSlGzZLwnPEO1ebMBCMEr_l7mOAA15ujD88q6xc_5YBwZCh2Bv2FltV9VbixLejqdm0hW225AP2PetE1Tu1UQKWnr72VFLRq54jcBPXK6pnfq19ODz2.jH_JVnSqwfhGdl6_2DQVqGWUC7wcnlhmd
Open service 104.18.124.47:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f21a2efcfa"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f21a2efcfa-SIN
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f21a2efcfa',cH: 'kAtFf45EyCzOrYwcUjSyf4enT49zlUgHauhOY4mjZXA-1769177756-1.2.1.1-sqA0mT6NNQpXYhUtoQLBa2XI.1Xqfn2Kjl9bmqMnww5FGdHGrIlnFG5d_BnR1kzx',cUPMDTk:"\/?__cf_chl_tk=O4qMjURQ1Oy7SU7XLOF4Z7pi9oL.OgTZZDhZrcXC99Y-1769177756-1.0.1.1-XQUrxfDKkwVd.Aa6ReYTsdVjbV1KTo5i.RJJWwrgwms",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=O4qMjURQ1Oy7SU7XLOF4Z7pi9oL.OgTZZDhZrcXC99Y-1769177756-1.0.1.1-XQUrxfDKkwVd.Aa6ReYTsdVjbV1KTo5i.RJJWwrgwms",md: 'M3ZLrv1cALrrQUZEX3U13j9IQ0fi4NKNY7GTZ.873sc-1769177756-1.2.1.1-lsnJ2ChQOVXx0bCR7ODjpMyYDRVs97UBbXSfe1_rUNnpI2AU2FLcOLcJ1KzUem.HHFMGtLjgfetSUJHa1fpRgn0ZblfcQ02Uy_NtWkwW4lW0e85lgIyvHM432T1BaK3WiCF7J.UwdvreaQpwC5LDNTrymiNgaiAEGBg4Dd0scwXAVZgxk2FtCoxayp68vWYYICzpHkuFftjvMvRwHbMi9kpjrCxQCamATsaKH2Xy0aihPWh7mrJfsv_OidWFd.vOJF4CphTc0C715mTrrEfaAN.fiImB0fp5e.UQVo2CpPDToPP9FA6CIVPz2K5OkvsEpqtAKC9emxRvpf6be.Dmf0qxyWjICC9GZD35MaJKnVem0yEc5v6TPNtzS9ZCT_2v45zXkzod6ZbEdCEC1TELVIgR.BxlUJlAzpz03w.g9wZk4pL.B.5DFJUBB.9x.c5oatwH604GfcR1gPFY0kZO1ncEHihK3i5ZBW0.eDM9lK6go1dLshtrTJ7JyVX1cNe0SqYquBG8CmK12UPNpO8mAwfhll8.ersLbsLPilLO9l5bSNRTgZauR_I0G3e4633Q3Q6aJdnR2PyDmgIgEU.RyQP7OBPaTgs12sZOacrizDwrNGE4qyAmDz3okfA3GAHp4dYpz7ZOwdHC42cv1GHhRPm3m3zuUihLnXsAzvQ5FK6p1QdxqerTKYHBqgLZnLNUt_dGa298sVbT1o3z.z0CO8RO4fVKirxKXUPxKTRuYEUfRpMoCxMXAaCZL2Tnaswg5ZsvBVufOkn3imTeZf5q_ouERdyvh_LrsTPxBQjrYsbfHPJYZz9YR0glWoeTH69.z9fL.9TgYJvz4TrIRqIhu2X50nHQ7SjcXC1f1XLz8ZhiLMwCl6tjpwxJUJoeRptdHkbxn1N9p0a9x3eMjTt7K20tsjSd4Dhko9.Txg1COuEyWdqnLlzYTvS33dRStXZ5Xl9gsl3wM.BzIuNjKtkyT.Vw8PkGwtCED0AI0rjrzl4',mdrd: 'MbPNKPWyZwkSBnNerQX0P762hRL0J12rT8kvzU0N8p4-1769177756-1.2.1.1-YibxZKtYz_gBfiknp1dtbK8me7UVuAnN79h7pY9KxeHYOH2qgyXq7PRU_pCsdwuu1IrptYHVLXaTyhwtvEW4hMdS5BxrFIFSwAjpbRUThvL2q1P2I5Lyj8loQs.nIVU_ezcchcQi3FBE9Vm.u4DAPEQugd6TZT2WIRzASW7R42louGgD4icC5hegZobhbqftcDwDlEUDPyq1.W4SZLMwrNSFMvyX1.Z2F0FEBxWURE5sc1j9hvNC5SqddUd8GIpFrzeOXh3EM9Dfo2buq8OkbN3Yb0EKoqmLYqN0VAlR27YkJY._bR7QkspZoskjhtuVhJFyZD5DMkfZHiPE.E.0Zv3xtr4PuRFFe.tzW77bdbe8UpvRTar121GX6FuomvPWUoxM6hy68WQ2cyAp
Open service 104.18.126.47:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4516
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f1bc917adc-SJC
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f1bc917adc</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">146.190.63.248</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLi
Open service 2606:4700::6812:7b2f:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4527
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f1bc24c782-SJC
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f1bc24c782</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2604:a880:4:1d0::3d7:5000</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&
Open service 104.18.125.47:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f1ae1eaaa8"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f1ae1eaaa8-YYZ
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f1ae1eaaa8',cH: 'CS0NrhuNKPXzPPVB9TfMpYmalk5d.hbdEOh7lUMGSSs-1769177756-1.2.1.1-xWTQUgu6zgf1yy1zZwFGtEBfAIT26DQGhZp9bZbD2cfexBhb7L7VOIvfOz92V.j1',cUPMDTk:"\/?__cf_chl_tk=6CU15PLphwwL0u1DsAZ6pb6HfuUbeObhQAtoVTcKB00-1769177756-1.0.1.1-Ozg_zcBaHmja7E6AUMWNSnKj7vmdPEjaR9V.kL8XIM0",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=6CU15PLphwwL0u1DsAZ6pb6HfuUbeObhQAtoVTcKB00-1769177756-1.0.1.1-Ozg_zcBaHmja7E6AUMWNSnKj7vmdPEjaR9V.kL8XIM0",md: 'VDebHUbkhMoMRpyBIpwG.W2w2Lt3qd.aJY_Ki1wKets-1769177756-1.2.1.1-Omso.ZD74QKQEWcjgcYcoafyWYC1hnn9ieM4Xk1Oa5RHR7s7qxSpENF_wwgeRYT5irU2um5MVTUkkvPs5lCaiqsJj30fsQ3gmME2_eWDnZw3YRC2D2ds9VxKcXTfXMF3qAXj9fnONod3Xf5Fi8x8uDk6e60yl2GXHLRaszlkYFCsBNuDhemvUC3aDWd73njRtOmd95c5i1L3ffNVodgFPwMvCc8x9UomTStYcGpnVEM6jPlUDbExCZlK6nYYMNNYU4DZ4J6wZuDZI4SQ8aQ1FgqTtodsNubfHIQuTeS2rcWvdffvzyfINT3eWlvwDoCFABeKN_mag765FFm4E3do307RIszftGmTRHHtbIi.npkqPZCJKzS6sxxBNF0Ew7W1UQmhzakT_JTC7qEDKC2WSHhj6_M9nGcQPeczNR_FeOyi5P3r_GIzJdrBp8TKvEtnALvEhh.rK_3BIptYyq99spBfFX7q6aEcwkxegsORsSq04BShJLtpO4IuUu2IVicCFoO0IyH9UX2zHF2lEf72Rl4FA5dbY3IqF1l9b9Ykby1j7LjgjnMXf.F_xvwD2.nzgp6B2K5efa1Ms8H5u1oBIh1ESDDLEwQ77.5aTBSrE_OOG5TnT9whkHvThHJAwXlIu5Djbl1x3vSgJwYKhIYw.fvG0mPCe7521s4lskBwvhsYtrWYh_XYJ4VJxwybZ_vkhaurtxVHT5sGyLSq.ANSTZF28XKMDL6aNafT0VIZerKSaKojDHjXNeLUHi_nZuY_SzGc8kPNkzcIhWwUYLXRxFN9bNxuraSVT83sGf68v.LL1Lk3qHLvfVJR3JT8vqxDxjRtylN82hu4UVuLuYMKyU5.YYUlSoFZrDXKZDTr9hTiecAqVz3q_c6Lk1MPTkKY2ROiJqJKsv.5T8egpvnwyqBY.clnaq6WJvUtXmLY1yhH2H2vm0PS5SRpbs.wdkAqJNS3LBxYubkOJ4vAFbZKqHMmxdKP_MfFgJL6wFQuRdE',mdrd: 'mzr.6DqmSR6L2YteW0Urd_AOWxENx8IEwnQQgm.ofik-1769177756-1.2.1.1-HZ9keXmwEPLqLeq4xl14k.wRwni8Udkl3.A9lCvlhsY98lnmMdkGG9.xMcd7SKl3qdHITaeetOXIqeeNbZ.uUtotSp_74JsrkjYp0VMxFOIhlG5bR.I9hfB3iR0N1kYfbzbqwzRXj8530.dn3HqjObMngtIqSr3Vj0nZ.r9zlGgHw_85y9E5Vz2phOYLq935VZHuDeygT9HwhNCRJmco8R2CXro3YATx0P0_KeFi3iJ5qwaI3VP.29SVWKCw8z_7ZUtgJ3QnprakJr0qlmgIXLcqhoXH3bM.21JdbZO0c7K8WYWLIzyTvUORd4DGfn01NTtQjr4CstUDqIxZFaPctlemIaOSYSGKDzvH7Huwe.Vg0j6By.ECeCVh2AnEDwZmO5c3hbtLmWAVmmBn
Open service 2606:4700::6812:7e2f:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f1cab142e2"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f1cab142e2-EWR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f1cab142e2',cH: 'CCcaL0UBquteYrWBbLXx6Dbd4UHT54CzCGNnTSlV.Dw-1769177756-1.2.1.1-Bk5lzYYQUSg65fkOJWY_bEU8YciKNZ3xKHKb60EanqAEn26nQ1renkomN5rnFaaP',cUPMDTk:"\/?__cf_chl_tk=Eo2hBZLUIkhAUXnsYlFtu6DQnqTpRXxvcutLFav4.EM-1769177756-1.0.1.1-SkqC1kaLVmAIqZPwCT2WJzo0xQhT4GJFr_IetnXWw7g",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=Eo2hBZLUIkhAUXnsYlFtu6DQnqTpRXxvcutLFav4.EM-1769177756-1.0.1.1-SkqC1kaLVmAIqZPwCT2WJzo0xQhT4GJFr_IetnXWw7g",md: '5.Eewem6PwR6mbG8KyCdl1.XPx9irANd5C948XOf7Ps-1769177756-1.2.1.1-_VWX4NjneH.BF.XIusZHB36acLOp3L7VbH5DXUsKBz2BOB5v7nRynSoqxW6Gd8Umef.RCzdQWuEipV_uj0C5MumThmH8Do.LuLZqUJsA5PYyd7PZgapqNFN7eod5JVK0PV8ktUcATS1URWSqF7Klf2v1DkMsZNANJjVuUvqIH_DdUGh__S5QJ4o8BHv8XY0QtQVrjMDzIJ.PiVFejHve0NZZVpOliMCrqZJbUPEMjkEEoJO9Y7q2GNzlu7jbG4J3QLD1daApGuSEci9rUNePDrymWRWM5qRLKM04gDTc__zt0G6k3zKW97LPKVB2hAcp6N1uax14MOiD0aWMtFIr9Lb5HD_fvUxBD9NJHWErCE3MDdERZq6kgv.coXfiXVCxC2uIpJnNP7wT2Xl7InfT88eSrcY5pfEnH38nSL.xuATlPgwQkhjufSngW7XMKkN4DCYqQ1HAlNuFi0fFW_h4kJWCCbP_gYyhFtQ0TbndVpgu_tMraSrlENgHQHHsxaXK0Q7VvFha3PHc.zN4vhAgvjlnTKSxCxi_GkNmVkEJqU1Zod37VGNB5zVQ0HcdfyV1z4f9EV31e0YQM8k0oI_sio0PlmlcfF1yRwkAOLXNv97gtOuOlHYFsw3dbUStJ2m9DY_eJaG3HoSlLrOtgJTyysuMw5TrjY.ZR5FGZD1yNdTPEMwCO4TVrvD4fFf_TEYeFH1gFJ.hTQ3eiALUY9..llT5M37UU7k_Bncok5gu.vJEQTa5tmODkJmBo1IgGl_YWf7oaEOJw22MvmcE1I9rW7JyQ.2IxlWQ2AKmzgiv9gCRdJvqYR2KHqeCPqL_8fXNaPhU5NTJ90Zl_TB46vwVU2yRCMfcJYR.uuIR8nCp9tEr8yzZhAQ42YSUKsVh9T3NIvAwr4vcacradH5YkEOwYC5vFTtFISNn96IRB.QDqkeRTqFXltzPiOenqsW7zQHU2RFeVLmV0dpNH0jGkRJ.oybCZ0nk4rbyMUofAm7Dz6Edn2hKjAkCIlQcZs5WjiT1ZCqNvZw8XRrD3SttJWKYyQ',mdrd: 'f4vZa97NX0r2Xcj_b2p2r.F2IY8rmkkvv9EyuVK9zIE-1769177756-1.2.1.1-jGTWxOJA0j911eQqeoMLWvtOAG1sxO952Q398jb6_2Zkh8A673frSXOvS_noDNNNE6N45tuJ9nLcAdQRXZPkMwNw7iaX4YRbXfAGXaHR9BryMCx3rINBOPos__YIlZ55.hLo1QMjIyCPHGw81Onk8AFZgpb8ggYGlmeNptr0OCr42hcjhedFZzSpKedfHC6iTpN0smRoTbanJosvL5wkXBG2LCor4e4Jd2eOdT2.ax_u_sSm9Vpomb4yrwfq9Lr5o7kjrCZQY_4eOu_OtCX4ip2iZ1np9ej6p45SzajDIzUbEgZ87lPvQS_2qa2vgFy2P1NZ8S3O.KbqJoB6y8NOmWXCX_Cp6rgQyapgy
Open service 104.18.125.47:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4515
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f1cd76363e-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f1cd76363e</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">159.89.12.166</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLis
Open service 104.18.122.47:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f19ed3445f"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f19ed3445f-EWR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f19ed3445f',cH: 'rc2jaLyKrkMknuYVaAnpe4Q1RNvG0CZAbhh5dst5Pkk-1769177756-1.2.1.1-BGnwrhvS5_WAxDrTdPGwr.RQ2c3WjWi0SviFXppeR70nlf2QSvK8HEiQex1lztT.',cUPMDTk:"\/?__cf_chl_tk=qutlaB5Je7heUn1xuNHxXPac649Idy_X9KQoGfEK4Iw-1769177756-1.0.1.1-BXGMycfWt9e6k59wbdsbTnvWbqb2iMlbvwMAcGUjFfM",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=qutlaB5Je7heUn1xuNHxXPac649Idy_X9KQoGfEK4Iw-1769177756-1.0.1.1-BXGMycfWt9e6k59wbdsbTnvWbqb2iMlbvwMAcGUjFfM",md: 'L5FbABYvSQaJSi9vLnbzFJdmPJNjxo1koHurTJNi_NU-1769177756-1.2.1.1-apqFfRxBwHV47IvLgHJ226OEJK2RzxZPxMqaLd09HzK5Z1LiG3_qbxiVqDAFmiIU1nbN20unQmfGxouyZWMGPdcbDQRW3JPRWq9Oukdww3ssNhJ79rAGJ6.MjPPGY1X70PDKkD6Jod3.QeDFBmbwCMSyprEZutMCJRczMAgTz6UblO_GJtcAY2ukC75wqR6tOIu.kVd_JSsiU2Bit32UseUFFYTJOZYMkDP0VdQmgBj1d9A.FQYMQKMLg74JPbVHfQMMfHCVs_FuPKxVQHblCipvAooM1z1SFuqDK6kU7Lgk6LNjkXsh22RlkDNx0PQ.OTarxtl6MhB8HD6prl4rhR420cwhtQO27NNnIetuotOyvxe49KG04.ou3fCg8G0aRuCX3l7TZ3vbsRFe5Oqxb8UJQPw_IPtr3Yn53BfoKc0qOQiiTuh3HmH5wVr0nB4Psjww.H6K0RAXV8QNEk3yO1I6U1b4jaHfzEIya5pTPUZaP0EBQn2F_SRqn.WJVwroFMOUL8l4YrLDIFxVIvTyXuA_ejZl23wn6BYFATbOifnYQ9ghfZv3GM6y_9prG.fjzY03tLxeT1u43uZScSf2nqVOimDjofbusZFPT5lQSPl7xHa.w5kPHOjVkwe7sG3H.fwbBajR.RVgkLfqDdr9_YO9FV_SssSrYqTfEyiryl3k08g6gvvjRT0iXEEQ7BVEpPzRzJxxMVOCN1IdtdQfbtCLFdy6567wthqDTbJOPJZKIPNeukYtRL9D6g22RRFcp67DH9Il13cnXarNreJ.c_wUMVIASp8v065AtMvAUjLTFquFR9SsjHjFb6MwyJBMYx70AbnEOSKy3n9DaCRHEkrzGwln2V9dwYdZwPxY562KqzBaCQrPkp6BtRLzqUk0BiLKKAonSm3MTSLjhtI5fGKJ7AADZ8AOLuxhAwFozCji_.gFAGZZuuJLwVQSz4ykz8w4F567hQngTw320pVJVSmm8Bs_dYYEwecANyQD8X4',mdrd: 'aQH3okBcOtyrNvB9.cozxZ8ha8A2tPzixUtBvJ1P5Fs-1769177756-1.2.1.1-mmq4qTh87CRhAwL1FLIkd6CXNDRDJbdRLcf_oocsJ7RL2R00q5TJh.8nihy3GGNA6J.A_m5FS41bl8WFTBT3VibZVwgNvlyaxSZ.jpae60jrW6_MEezJ2pRzRrxUyNB8YzJLuaImKvx01xxrppaAp0fe5enRYYTNQY1d1JIx7WeUXd7L1ch4T6jJg3tICkkj3a2ojvR8wViMKAKaIlzBkNVafpDTZR9c5RmvH5r42Gs0FAosQNqQh1rtzUcb2EfugLEFlnKZmUfC2.PGC6uJSvsCrClBH1u.7NeGb3b6PNKeKodGGGJZc3ECft8GUUwQwYHTE65RdWES9p84z03z.Wjbhh2fObxY7UF3tk5K1JR4WYh8RHjmF_kcIw_x3UtRJY9XeenOd4sjki8_
Open service 104.18.122.47:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8630
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f209fe36d6"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f209fe36d6-YYZ
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f209fe36d6',cH: 'kOUxsC77UwfklikRBgKyZ_fLOrzhcCda7hbl4X_INmg-1769177756-1.2.1.1-aiSOM34GIYMK6c5dy1cwEbe_UO1omeiJIPj__42y2moBMGW5RsUzhWxxg44SjQv3',cUPMDTk:"\/?__cf_chl_tk=ocYkoRj.C8hA0peZY7_ws2643Ezt3PH4oTiVqSrrVZQ-1769177756-1.0.1.1-0baN0lnH2EX1KcPmIh3jR62Mdg_ZVea86lXuK.Toztw",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=ocYkoRj.C8hA0peZY7_ws2643Ezt3PH4oTiVqSrrVZQ-1769177756-1.0.1.1-0baN0lnH2EX1KcPmIh3jR62Mdg_ZVea86lXuK.Toztw",md: 'Vin9eB639m0JHZ1gXW7ptJ4OcaMVoOw5GnwIjCARgKk-1769177756-1.2.1.1-ien8vI5HcrYrkCtCZHKRnybc4QptgXLVTZUSxrJHb.BZHCWWZv4kKITouOUHwvABG9OXASEQgNf1rzqqmbba7iF.07RX4rByIc8DksjtgpnvDbV.Itud1iowhZzQm65KhVsKK9Yiztn2WSu5eAoKjeLW321IUDSjH5b0orerxSkrl.pFBHDDv9tJCR0m.v9Uo0CsjfigqWd7rML7yjGHBUndnHtzCx8RJ7Nbqyd6GrN0LcYXh6Zm4mp1hG.oV5lw6QD_4jWVypluUTMApvaaTGPuvaOMoDZYjd_.k7tHqU2pvhdToxEmoUF1SPlcZQTAxUV9NDNo_xakSTGzC.LIf00pEAPkDPoHrk9t8m.pf3eg7BbaA9Ndn7jFpKPA9LlNgAAMF8tk8kw1s.Nm38aOuzDtvMOPYu1cncwrsMOq9xAsN3KabWc9V.s.tTPDkw.zUI3gNJx4sTXQnHZ2a0WV3veFjkxL_GtVPOwVxGQ3YP6uY3rpOu7S6hjGfNZECTYzVPzRRevJX8y3vbEFcOyGWdfzCpIY4j6Mt.zB1vaW8igYEqfEwQNExEHx9WRhxSOF3pQeA0qccZbw.xIe1w5zxrwdFywl9NzySaxQO3AOVwdGuH3j6nwx6ZG2svGQC_sAmLDJmZyviV8w3VTL5uq_qk68hrNmmaGDCI4c3.eXQp5t06jrTHz9JGgT0U79vWv4w87P_zrixyRO4WnWZ1y3t9lvzDE8.2jLxhBt.7VbwiuXX.sbzLcNUlXOD1.zgevbATYJc_wZ3GfM8pb15jeMEku2RqJYPX11mSCG89qjqrxg0uHTJz1C0.F_MsMZQ3R_ZhdHCXPyqHUN9MDc7GJqXBYuTzjcwQOfFpLIuhM3BLh67MX45mq01UUrst6jJQkYlaFtQ0X7GA0EZjz0YVpjuitQIn8uM7_F0XZ7ij.j8X7yuEnknaPGL6fGWeHrXyGocvUTHCNGcNZC22VmNQQBmZ2rN8ONhCMnujszK1EEtPI',mdrd: 'tO.D_f2ukN2aJkOsPYXoh92qbMQLIqnHBgtHTTmee80-1769177756-1.2.1.1-shQsPLLmzmTYOMqh5K5tMFAmLD6EzqkN.ol_WTBFCzZGTRtbXnH47RiCj5tZqi1lTx.myEMW7Rl5Br.1mw7K3lmivcjzeHdEY5bKBHGQZrzLSoeuzUEgrCqSnn.iHE.q0m.464JFqCX.LlbIX9sS0xvBHrej5M0t1FtXx8U0s0wuEbUHJqsGu4_lRBSdLWwsl0iVM2vMfeypvNTOzDd8G0gIcKLWH_cgzQ9qXfUFNicw3Gf6ik9kr4a.xTfeA69kMut75aDNnqyCA8LUugzkrSRU5rxYdPOn_XjG44yzqwLPbpSU_aqx_3zM0z7eKOQtaY5AFJSjnPNqiiQY2CMUbfNHDAIgyatIZZXpGXzlOU9G9Dh6fdiZVgUbQPvjKRaXxRf6XYlqVvqvpAYi
Open service 2606:4700::6812:7d2f:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8695
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f18ef3edee"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f18ef3edee-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f18ef3edee',cH: 'DpBPmtAzZzQoQ_he.4O1SgaINPXtq2Yih9Drrw9yTmk-1769177756-1.2.1.1-k9Lmn12oNHHhOp1Mk5n3H_gN7eZeG5AbQ0uuwxbfGrdTlKN7dhRDTt5jBvdqT4M8',cUPMDTk:"\/?__cf_chl_tk=XSALVBgKvCHpoX2luuD8AnTmvA0JwVg_l8gMSjCZi6Q-1769177756-1.0.1.1-8IWoaaCEbnl8svTO2Lq.dURjAnOh5JOMFyxsD9oel9o",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=XSALVBgKvCHpoX2luuD8AnTmvA0JwVg_l8gMSjCZi6Q-1769177756-1.0.1.1-8IWoaaCEbnl8svTO2Lq.dURjAnOh5JOMFyxsD9oel9o",md: 'qzPOhEUWWhum6GjHPsU5pfYkOCdift0ns1cqTxH6Ch0-1769177756-1.2.1.1-LGfXNNrmwXOQdwMq1lPqmnyo2Tn2aqLhxf2L0IEXEQyK8NQmO5YdnSTJiYmJJssHhCHEIRG9_0SSIk4ItkrJLUbWYMexjMQ9liZ71BaFJqCuQFEGtfE5uJ4DtIGmkqkX9jTV_qsLj5yGVOiU23AepH_VQ177rJ2zT.kYhp3h23Hwr.GyBVixly2SCZ3X4CNFQV0ACUCLyGKpF58xFxsbgrl267JnzPuZJKLUCpPKCzO34wqZ9U9fyMYBrM7aPsbZQJap5zD5Wkqw114R.sLVBxoiBUqebOWVsubuDgYLEKoebYEa49PQ14Tv_1biO5mxB1LxrJDMN9Qp6Tu4_.BtcaEnBKb8XRbfLjdKSGSogIdVPf_on7lwR6RhSIHQxX67LB6z_PknNz6K85iT6ZUVPzHbnrN._adPHH0P88To7sNa0Z7lE8LaooYG4iGdGZanDWbbIv7v.dRwz1AoubQsRauz22O467fpFzZBD5Eh77B5nBtzn_lhZ5_1gIk6WSP.RVAvMPwvwo_fsVJPmYzPPB9bcrl1AikBt220.nGzNLJjDmS86ckicaxNRn92S314AKsq0nmDoraUf_XnCFeB2MtO184tWqZEB6MOuRnThZPSSESXmOlM2g1A2DBR9jkLThNw3OtkMdHq1dRrXgM1t0c3w9BhjfUfEdvDsmsuVPtqAPiabzxrodvL8G5ipYzVCeM8U48SuF1lHxpujUWB79.tZORiVuSajPF9k7oza3tOk2xGiPU_85UjuGqhse7BNaJXm.mlobOG4MnxzBmSQ5GWt7PRlx6lhwTLWVLTXh1mymwrFt9d4vL_n2s36Ay730tK2VxlB2AY6pe4OR1TReTOn9mza4gMZjEB_1Nw8ejYBDAGLh0DX8kDfs3oNRulHjEU7vAGvY2oiLMKlqJUSh03icX1zq.Ps7Bib6rsfFIFAFwRVHaeiKapgowlwnSs.IbOtAyOhGzCBEFQ.hVZ4fyDzPtLPgX4Oe_IS_hOfRb3dtnADlxb5SzlJB24Jjd_x2dlqtSmqinVcclk.v9kCw',mdrd: '30.TCE9R190C1RAxBJa6ejnZw7Y60f8w1NC0rjsN8AE-1769177756-1.2.1.1-QENiXLTLwpoMmAGystc22OL_QmB2m.j.F1WjkjE5inrDO3Ovj9hyCvmAR3XqlnXw.GgeuYKE9VdPCmd9S8VgErY1Foc.F7CttKR3rAjqGMvy8I3TTUi2NuRzji_rH37C8l4p2_7b6ZnOOloOv.e1Pyj4FoYIr5h78jaTgZUCKVosGEJFXtu77.cbPoHGhpxr67XMSx8k8k.hIarSPLLGgTCo6nm85xCHHlo4XeEj6z1S0pmD5SiDgKzk6H51cQyACe_d_r6t7nTljDmfh6ctCDHvs_SyJkrB.EpLdt8tlKgHOVOoilqL4jHXjEmeCSLoeVcXGH.v2t8aj7gy.TV3chLqigr5KO6pTZF7b
Open service 104.18.122.47:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4515
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f188fed06b-LHR
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f188fed06b</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">206.189.19.19</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLis
Open service 104.18.123.47:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f19be3e8c4"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f19be3e8c4-EWR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f19be3e8c4',cH: 'T6rKO1rw6_nDBauiCCLyyzgoN6w3_R8KuXHHBI5MHAA-1769177756-1.2.1.1-gLkjihN7.6MHy5iyosvz4SbfVEXkHzNhv_psNJlq.PZkTUMefCbDJWwgLzNyZ0ru',cUPMDTk:"\/?__cf_chl_tk=OXDXXpocIHpWdcSyz00C4SlWhYHgtdRj7CO15Btr084-1769177756-1.0.1.1-Yh9Gvd5PVk25RUsaw_iWhHkjX9lEneq6hEG6cQ.iZn8",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=OXDXXpocIHpWdcSyz00C4SlWhYHgtdRj7CO15Btr084-1769177756-1.0.1.1-Yh9Gvd5PVk25RUsaw_iWhHkjX9lEneq6hEG6cQ.iZn8",md: 'Hx32yVa2TRPvDMKrDWZGZ_kKxCuNWPxBu1h27ldJUiQ-1769177756-1.2.1.1-w45llntIuU2ALKfWpSovXYwgUTvapV8u3xT69VTj8KLj5hUCDYqJPLqyiXKdCOiioEitVDxw1RVrEPaP9BG_XbCPaeUK9jYvGhOxz.wIby0X1jjDuMgYgLG1iilvkST5PLtugOH2cbQNA9LhoxnyLJvYvNqcGvgc9ZiIrsqn8YyH7M4ybtF6nBdsTEcxtGAtShWjquiD7fXD2O1G7YmqQLtV8fBpGovExTlUfX9QoUJn_6Bufb8a8McRRyR18dTwzVlGcjNphEP6GZshuikC0VPcLY0WR34tVV5i5ApFs8Egs169YZs8z_04pQvmUnQWBxJyAekCqPi4gWKcRWw3NXEOOri9QBQrEi2PZFUPZbzV4Btzy.lKNmUBkTmRJxGPLbIDsj2ky8USoo0nq6H6EozX99j5qPEhUakXs2B11mc1Jl.6ZVp9jSYCYADR0G0hVNIThyfLmzDSi9YEgm08741vP8VkwDmNveLBDf37D1EsxPqJ6doQnYXiyvQzEz_wIMQgXozNHNhBnZ7Ef3jlc9KUI02MV7b77Mc1iUlC9eb02zBw2MhikdCMLOQBw.FhNv17iYyrD7OoRRVdEueK1JmA7ULBElsWKqytqEhIrML1F3.k0rFaSxN7f412yVl82J8295X_rNsGuNRNgth69cTsfQc6.AP1H89zeh8Q9W7RldMuAt.50IzOHJ5m1a.beWu3xirRuEwLLHe6r0hH0phcIxH9Zs1CDafbQKPMpFosVkz9EhTj2YYLQDqmZ_7C0pRCW.rVyMdBdLPkjLH6D5YFmP5I0IlgAQhtAr00T2xjZoZctPk3R1IheZqqJ5BZdhg5Tr3s7SwFnZ2yCLhe7Pg8i0uGs5Fo6Q5zIuliPgTsPQOCBfUN5oKZIzgAkSvxq.k0Q2rhA3VFtoIJj4HzLTGU2PIH3723wsshIryaOUm4_R5jOMHoP1hdo0ELmPmam1.yQm26xMGfp8uPe.pZjrmE5CLBDcPsbEqO3UwEsDw',mdrd: 'KXAAAD6E3zVWm0Fs0b9ckfA6tgkUAcSUmxmm5vjsoa4-1769177756-1.2.1.1-Zn92TPgHtgg2l4gZCBnlGtprCvL42Xqn5WZ0odpo6Y453kZdFNpAINgs1hEOj5xg4alQgjr4LRSO6W.Ry9SMvRGn8.IxqTBZIPrHDFD7aBvN4knk40kszrup.2tRIMI_nxkns7GMl24FAE636HC44Xwfczc2xrszN6EgoO5phIgnRUq3TP7OycFeLS_eBmb_54cAvwIdQCI75TQZ.nD5oNlKWVl_QRqrVCLbptqnppAScU9on_qvWqinr7wk57wDyOkeaD9vDE3iUMkcgIUa6zZwdVZqhtGnXrpqYz6sz360JZrxHURKeNU8PRGp5_7KE.aYY4kud7vdSU.57Qr7H4MnKiHpa1Ftvp312JNdidRpNtnRkZjmIJTjw.0YnZz.YzYyTyn7.3OnlCCf
Open service 104.18.123.47:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4515
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f179e0a62e-EWR
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f179e0a62e</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">206.81.12.187</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLis
Open service 2606:4700::6812:7d2f:8443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4527
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f17e4cdcb8-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9c27e7f17e4cdcb8</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2a03:b0c0:3:d0::1413:d001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&
Open service 104.18.124.47:443 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8652
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f178eb3545"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f178eb3545-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f178eb3545',cH: 'xSr7_L.UZpWO1j68ZuOkfD2WzdEyKTuhvO7Dwf5YGGw-1769177756-1.2.1.1-fwB18RtyvY5idWNbANydqKzKddcjSBTG0FLv1aCm9bNAm1uym3Hveml442GsDOMu',cUPMDTk:"\/?__cf_chl_tk=aUr5hmmx4SG2OqsbLZqBNiUmBhggjF8vbAPm7iDy5p8-1769177756-1.0.1.1-byYm8yu9V.XGun3xU9i5r3.baHu2w4IsdAtFodqmY_I",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=aUr5hmmx4SG2OqsbLZqBNiUmBhggjF8vbAPm7iDy5p8-1769177756-1.0.1.1-byYm8yu9V.XGun3xU9i5r3.baHu2w4IsdAtFodqmY_I",md: 'gV1wzUBvMgKAMJ9gb3WhJT.LYHCiX8PaMuOqk.yFteU-1769177756-1.2.1.1-h1vWP.AzT7_5X.TV6QljYAY8XW5cdFinbsrJghBAyAJNYFHyUCJ1UhTa8hdxbkUYCmzFv4XdLczj90HCZCSHaBsG4_Htqu_usK4IhjXfT_YVyUMmuCneVjRyFLFZwyOVxDHcwtR0joppAoBG.jgd6cABybS66Sv4BnVE8dK11yiowGRXyUQ8h5IexDFFwjadtPM5QgJFYmtdvQVGuCptBPpv.f9qATdrs8Axt0RcCgesTZcKrFyqHBvFiCzMzLwIuYNE5Y0ECFcO5yoqGx.ljbMbioS2hi.ooRqlpLjLPPW86QtLjOr.L9B4prZcJjqlepqB7OqHMZlAAoyzvFCPnk77lTCUoC4tbKP6mPAF0uoamjh8HFH4Cdy__obfbBCg1qvov7XdxmNC2VYpCkn0wI8lycfncWM6R.kfkzp2jrnFUzCKhzBXBOrq5dBkB.S47v17n3MALb3qa3u8GdnfEvS6IZZcywMDXmrROfMLRaBKUi3Ieg5ZLiBTuP4Lucz2G9itJYkBfKt.nBR5.vLIhVG2SI00mf8jwNC2Sl9mKf23DMYfLdlOCLoJwQId_8n3mPfzuPgfPnA_TzA2UeF7pqpcUInH40GqWnDp2o3mTVBGXjvONH2s5WFh9WIlOg4rL57JtUkh_c1RnFxfTJkGG..0uV0AUjliIcAetks0KlemRaEVDf7lJMoLTT1iTi6hxPP7hiwrj2A1TYtJz4w43usnshCAq1VlOc60YFF8UziFL.fu01n389gAGX1.0yn_jaD0synFIupkorHYGZaFYOllVC_dtxYiObN_ggv6QKwwdVB2G3XCjZKbw3aKtDhmqWEoWlQn2a0OVhLIZmdqzaCMaorNGHqG_w0sT2QdvJCvAV8UmccL_WG7Wr9i1nr2d9u.99W3Yr78tS4lh7ukQikQzvCyHo19Q3vuYHRTnMAZnB41__rGMz.xIV9L0x_JFUFSsFCnGUyXeOFC2dN1Cy0hrSQl.DkDAk7GE6Q9540',mdrd: 'fdQ2wZ2Rxwv2nP4ZNNOmvJB0un6wIp.R9v.8fAu3g.8-1769177756-1.2.1.1-WtoELcaLhH5QbOeZ.kOsBBscdho.ujtsgcWyMBYxfAWlAHzHYt8zO_0RcAbsxmU2NI4X1nfTqquZl1oPcJ4RT_tlKxZIGM9gFSMBOwnd_DnHiDUnFEQ2Ke2vceTyRkImz0xnDL3hTeJw5lXtknLbpnmiuAphuULLDDUjrcnn0w_NV.1pV8TS2k4ivJ_zVUI4Yw.NhOm5RglrhKTnhWoboXzNJ5yMN.qy.7QEK_dT7m3elttEDlYZGf3ojh5OqDI4BtJ.tmYo9HNUfJDIyimK5dmNpL6pQCkAO.BFhDV3u8RNvOjrAAvUPWe9QgXRj5WlyWnhbIcpo._Maeu3G7TvpaBo4oMVbyQob.g7LbCK7ZHXwNo0vgihvZIw9aUkF4wCaq4oJ_OPvL8TDE9W
Open service 104.18.126.47:80 · mit10.alumclass.mit.edu
2026-01-23 14:15
HTTP/1.1 403 Forbidden
Date: Fri, 23 Jan 2026 14:15:56 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9c27e7f14c114f00"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9c27e7f14c114f00-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9c27e7f14c114f00',cH: 'xIrPZKthiY8W1SnVF6qRxdOyJKaKDvlTxBQmbub9L.I-1769177756-1.2.1.1-xW4f_Y74r8ai6KlXM1rp3x77R6KkYjY2s_.AIOjxVdaZ272n4olwKVgIfUwvoDO_',cUPMDTk:"\/?__cf_chl_tk=woh3zZZWTWoB2DWQN92jaN3jAWGLvI06qgMO8wj43e0-1769177756-1.0.1.1-X.eYGlaLgKMwN4AZQE37ndMfkPRHIqgSUfvUUV2rcRg",cFPWv: 'b',cITimeS: '1769177756',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=woh3zZZWTWoB2DWQN92jaN3jAWGLvI06qgMO8wj43e0-1769177756-1.0.1.1-X.eYGlaLgKMwN4AZQE37ndMfkPRHIqgSUfvUUV2rcRg",md: 'yg.3E0BFY13m5e11UI5.rL1Z3a3FSIZcMY3aWdMozco-1769177756-1.2.1.1-jOzA3NFa1XHcN01fvp5GiXahLG1.59MjrL9KmI1BpemPTsCVtWxVaa40dDKez4L0TJMjjCy.5Nd8Gil5vBB5J7Qg31IVM6H2dfs_BdpPRmMdFf18_AbEfcUyHaxNl3yHzdO16LhWM7gu4DO89sgKOjQ65g2GAZJlk5sJUjFUaa_DlnjCJWl0U_WLpD.a9qZHmVn5rEw431zVDPsqqhhOH_6BE6F3ZX1M2WsJZn06_wx4BwL1RAN9Q.tsAfm4Z2km2kjwZJKJep4seWpw0T5pYWSDPZ_tAgFmK08P7NF9Z717DB7MPh1t_pQWOa3f1fGzIu.sdAIB7cSr5_fP2yBBV2pyzCXpzu3xI3OZ1lkREkyTEFeO9I42ZzHIWeIc6lzGzhyoyOzgW_HD_UwUPGPpyC4IkIYItOI0CJq3jhfJbJzSA1dVsxSOmZTodYPRGAn.9m1F6VQ6uaB1S.axAwid1ADxKy_N1Jf6KmYmksbyuyPO5SibvlhrRxAJgiKuT8EIQ4hIlZ_oO.CnG3VnXkIybr0zcO3kaBicbPUwqJh91GAdY4CJKinlzkhehhHDI.tS8m3OgSLaH53qeohdZknZM9dlCmHcxJNVAmyX4DFt4KKrPfzi0Wullr4G6SsfE0p2q07fa1AwmjLRGaQpxWVclAw8kG1yLKcGdiYeP08XFPkSQiQ.2Fplh3oTHFbzGEJSJ6G05.FAy.5cJkx3zuvD5epiqNHCMqDaYVEYe78Zrlq7sBKhaKVYCYl6ideVICieeDl3eUhVjdzss9PENO385noeISl6silmEdQ3Zi1P8oqavxh4JHuxXaOb0b1_T7VqtQ64wG0Xcy2ocB5WzD_tJKYDO0v74y9amHaK74g59uFuPofmwW8FRq2RmohEOHKfcXD09TYmEiZykWSIt36RHz36KuyhwKcA1_OZcuqEAmcImWnD_iRMdulSO2UcDgWA.3n0HjOKHhfiZbfl6EOKs1kp9rfcwJjizww1qLAmkig',mdrd: 'EaAJ2uWTOavh3D2Dhi3pnmuy9Tg3gmEQo5qNwtY0v6E-1769177756-1.2.1.1-3g.UIw7vXQPicg2KhEsNdCVl1cIKmyz9tnlGQ_cBYH84wVz5ZFRhOFb70FrLZJUsEhv6vYYL.Q2lR5Q.rb4Pedma_2B_yLmNwRdCu.pb_QwqZowyMH1PFNdf2tkCLRerwbLba9wtcepJ7wUVk51IO3CSLsofY3UITgO0pCOC9rtHfvEIsMRL.3ZmK8EzLFFbdUVhtIshNXDxELbsBfbTLlfQB2nOq1WgoEIvd3MwBQ4rsNF4yPg.85IrS5oee4_cX7x_4OchRwY6irHalOgae3pW5O4iwgJVu3r6egZ8gWbZDJQqApjvK5oHpxTKoaJj4HH6aR5WDh5zhHS711OaSefJuQx7_VxKJCXwq55Pedr6LuC9viotq3o0nguQncGJpD_nxU2K.dvYJYe4
Open service 104.18.126.47:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8652
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70a419ff5"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70a419ff5-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70a419ff5',cH: 'auGxj.hsAL3sgI.d.G64rRVi1K4Zn_aB0a2bgaDdVG8-1768264758-1.2.1.1-FrzsclHtfq07c.sfzgYHtkcZOdi.exZKPdWsVgI4VqIShJmOw_oebYMMrGjT8fGf',cUPMDTk:"\/?__cf_chl_tk=4AYjDsp5W3Alz0RUvHTPETe2pw6i2AowBPdhdj0HmwA-1768264758-1.0.1.1-fjV5q_3.sjhJfYjc4qgKchHTBTgsm8HfCDHnmZLReuo",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=4AYjDsp5W3Alz0RUvHTPETe2pw6i2AowBPdhdj0HmwA-1768264758-1.0.1.1-fjV5q_3.sjhJfYjc4qgKchHTBTgsm8HfCDHnmZLReuo",md: 'Gb0ecb2WvZBBCWC_6zJ8KlyEM2YJ0ciAj5KER2UPibs-1768264758-1.2.1.1-RscntUTUntr5uWIseA_TrWym1l1rYCnD0TZNDSccCZckmRmRNLs3nmayLd601uxSWL8TKCIipwU.mRVtpjweckyHfbLZSguHoyYjg_6N46epW8yNi6TIZmxulNKWu4N2z0FK4UyS2cqs2p8mQphLas6p74QwlyxxuPq.CVzqvGu53qFA35F1kd.9w1qkgpiGNdtlamSgtbjWKNdGRO6nRf1kotgW0plzmgrLQ2WYx0Lf5cRWhtutGlWZmArQCK154cxZw75CFzA5rKFHHeVURSbCHmVsBHF3LwjT1OLwBP1e6b3ThxHT_wLz2IxP1qlkymaKaVQwizJkOkkt962G8ZSzWCOCYbVUVUXl01eUBz7t3ok4wVGVOtIg9LdXQFlleqnT_foPVs9xv9J6AzQXCt9H68V4sUmLQ.bJwTqmULwzZrA31wOIo92UIdo8DPDZiiLiybQf3oB8l0BY2UMnHLr2XuMP9MsaZjY72ZAovhU2kEsLbkB_XjlMYkSII7x1il0AHFlg75Xv0eb_A3gusRwrLjdJEihcfpjWpzsUCoEP37NW73IEqJotAcGgjECJsO8bZVyCksTIG2lX2YXMtBBbyqanIiuwga1jiE5V1fcRX7fPuQP4Nb4Z9oaYkQBGbxeC3IMg2oMRtUIwtX.4qo_xEyzgKAy3Ao55nZXYcjCkeSm801OcvnnX_AEUZqEYUOV.Yu5N0aHMPYbvN39J__5oFBMAmhYvIDhRLYJLhf7O7jCcDoaz79oWM7pltLeyFRfYu3ShWBEPLYhum1rXS6Bb29TdB9ajoEgibn6O8wjyXirzR3.K714ZsOAGKoOx28bkyiP9tU_ucDve6T.wHTJc93Neynj7a2nTVBcHaBIkOk_ixMWozlcRUQ_glEvG9zB3rUfefFzXJLbZ_WAK_s80Te8agYfdam5PpJaPhmtA9lA7.0FtHO6CDkcsO0tWPn7ebFL.BZnyGSiiLrziIR_eVYI.t3cAbCKPeH6Y6YU',mdrd: 'oxcHJqk3whSL5bsJB3gsUI1zftRjbm9_hvVf.l4yY9c-1768264758-1.2.1.1-JLDeJICYmdjLdWzO7fQJyzdK5TuYOioaOJjPfjRAqv22oCQ7_AYkxqgpJ.qAV64eOhpMs1iGLe7EhE37ywUeKyvYuH.hb0naKTNiFulCsNWh.60BjrMvqamKADJIZRfwbIpposOMVU4.2KQ3G9x1NGW4bLMzzLMncjP6iiFSA8QwNkwNNxyLilMGgDRjbCw3BJ0Npy0Nf0dxp3dGI0iwOBVoqaGzcxA3lPChrPqCDG9BK1nCgNGuSPcGrBhJPczuo9N0ypFNWDoVnu2o4Z7Lpp.ginTJ9cJvdoOkPlTnP6QSek4wxhjxDI24HHnL7Hj1nXrqgfP2NnW7w8AYMbEvGD_DJZw.0d6M6u.L_sJuvIvbedkS9pQhDDk53Ji_0GYEhtycocPHZeiNM2S8
Open service 2606:4700::6812:7a2f:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4527
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f71a818b46-AMS
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f71a818b46</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2a03:b0c0:2:d0::1733:8001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&
Open service 2606:4700::6812:7d2f:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8695
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f719d9b918"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f719d9b918-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f719d9b918',cH: 'r4WDPqdDW84g6yNjcFJOB9I.vyLPJ0dtrm185KMul4c-1768264758-1.2.1.1-C3aek3z8kuBronwYJKimF2i.Cq86XdqKVFLFxuoliC7hFQdXVnaaSi_x_Ajcm8T7',cUPMDTk:"\/?__cf_chl_tk=afevulIDxE8.3GmlcSB5EOemUfSS.glv02CpEOHS0CQ-1768264758-1.0.1.1-1ookp.fobj_v0Xe5tLQhh6y0z6aRHLT6YFmzjEYFkZM",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=afevulIDxE8.3GmlcSB5EOemUfSS.glv02CpEOHS0CQ-1768264758-1.0.1.1-1ookp.fobj_v0Xe5tLQhh6y0z6aRHLT6YFmzjEYFkZM",md: 'ag2POD7jOhVzjUdw38ZIw3EuUJdjsefsh4vNVeatXQ8-1768264758-1.2.1.1-hU8eBEorxoMQZVd5mgC_A0piFGhx._He3pHRN6n7SKCzQKkoyDhPJ_ZVAUJV.qyXmBEZHiZL9huIN5U_1UeHMqtjyK.g9vYtc3HTLAmUjecMaZvHEoy5ZSOoyZv805IMlPobCQq5CWuEpUxVj1e18h4Ob.MScBm3IIOdPXPDaeRoo7AtJJkb5sjyUiVsr7kztP1MHCbIXYe6S.01Xda7ro4o6RExek8kiT6p9nS2asze7JYtn_nRcb0N5Hl5jcJjNkhAu7rdzcZSMiBPm8cE9t9IypeUTaukp0F8LIiZ5ci0kZmXR6fNosGCRTX63NS.a0OKvgOJcieZJPagIb02oIhJaSDJdDrnBu6PYZniyCtWZUwUPkMcWkQqQUIvKzr224N40UnnG2OY2Ie.A7LQQWT5EfpxUE7lzsTX91GkrXHp.GAOrpgGVPQW_ehfN1fl_cJc3wY_VYg.VMVEOq_PCTq._LoM2W8nldsWARSAQG58xOgA7Dqmz3ADhoKpfaW8h4ygbn2LLwZGnHy9xif8TnT1bi1Hc7k0K05IUGrVNPjEJbuiMbCFZY1Ftw4vq237eLb9FZRMhju9o1jj9S.F1iUhpH7pK5zjPIGhogbmeRq4qJ5KxSbOWXs8V2NDHjehK48ufeU88o1B1_1wpA0ZYo6JWPaRLPsu0hAcCGFcyMDZE7sFrHoSpNdeVLyM3bDAfubNk2SpVvz6BSGt1zXWAtarvi1lWlXh1l2WA_hO_V70XbMSLrUFzGl8lloXQvCnE2gNT_O1P3jeKAWGj08MU.DZcC13kEjgKJLhbN1sHbQhiaGrXfFcQIw4cKD6Sjdg5HckzfjAavKinjiMaqSW5.Wy0nJGHtI2K7E__gvm18vXvmvksFieYctXaPytXgKUb.823apk.pMc0yRK0EPsg1MvuVJuNW.BAlTs76RpNIJpH8IQ30TL5Hz5oPUDKvt5Cg2sCJyPz6ss4.ByZcsayMWcoC4Qx4YfJznPxPsamCiOX4EJWlygCqKS3dIfkWVxr5puDpzuVzcfxsbeydkYjA',mdrd: '6ebsjquUaPqm3CTvNbfdG8B0YIdjwcFUSiU5lhv1o_0-1768264758-1.2.1.1-x3kokUSnUHq9bi.aPuGYnqQqcBvm9wEZ6443yhpbt9I7nctmhPOKvE0qREKLdhzpAtk3nt9KyXyG4qQspE7ft.qSXLxs6TsCOHcLwo34biW5mzdMojtRVgaNwuxTq66UTHSIOm4wPrudCr.yu4K.fwoDtmqn3znHRDmFJOwFmWvqyKKPawtnvDmC0gcx_mup1r4msfjCXpMDUNkPkdUC_6dJ_bDxfS9.mFoz87U20SbN2xqWh6yIcXOHw2zX7EUV3cRnE4cwDK99fbwC0ufT9UmHLFyGmb.ZhfUj6bTISjcZX3kIMtB6lDCQf5KnQa.fFS3NtJ9S_DBzuEApzhZBBnlJGPtpR69XGsyce
Open service 2606:4700::6812:7a2f:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f71cced519"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f71cced519-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f71cced519',cH: 'TICbMji3pHWqvPVfhDwXQkeGYnXZPJeL9pSaTN1Ov1w-1768264758-1.2.1.1-K70kQFFEoXZd.Tdc.K8YLrn5j1r6NgDJuR_EqUeoFNGXCn8MCOrBpgznX5CHmqkv',cUPMDTk:"\/?__cf_chl_tk=nHsu4w8VAqrrpTQQEowrwUVsi7P4DGGDdVQ2D4P1MEU-1768264758-1.0.1.1-r_h6KQtvzLZs3HNdL8gOCpqYXGcPAh1X53tGe8QRDTc",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=nHsu4w8VAqrrpTQQEowrwUVsi7P4DGGDdVQ2D4P1MEU-1768264758-1.0.1.1-r_h6KQtvzLZs3HNdL8gOCpqYXGcPAh1X53tGe8QRDTc",md: '69rMJa2Fv6WnoSOUZ1bWyemTjKRweBiM.GRZ92Tk6DA-1768264758-1.2.1.1-IgUsYanJERfuM34G6RTTN3JktEv6KFLCs2PA_EoDtgPJZLnkHyNrhpmWXUxNU25CFoNQkglWwigHFcDE8zJ4PidzQ8hLsvDyd4Y49qLJ2DzrHyOVhOu3lk9fNYnmzuu9sIQY0G8Skh_l1ve0e9nSn3to1BdHP8xaNkkHKfl48LfI_jirHHy7X9x9f_EiSICNRPRHKnSyQRCtmT9nfZIwx.OfXgzgJHnBfvmCidnkm2aGT02EXgibObt9Xf5r75Gk8sOuRK3yhyI81QvM91hr2WgZRDImQDJcxBMPYh4WTr0pDMOwvQADgbBhJGIrxRjF.OS1uSsaq51onoQnh8LKykEclMKko_7nDd_3asn8fctaAB2tVWvoBkyZMuEj600e.aOQR69xExijLIEi3ai0sXALBmFa1SiLCipzRN6Ndg63HsGha.b.SUGEQ1ZMSi_uz6kI64YiNfDRqnPBjgHLX86HxlWCTT78hO6UwDzHf4V5WmcPZC3BpwNGP0arvHJaw3UleDRO6z4IQXuRze9j9zrDMo12V9qb1NenLTCreEq9er85T9P3jnxVCcyg2mPUtAjEHnS8YQzRW5XtF4nmc90nW6Fj3kyeWxyC6ORguxw84JUoVAytQSwpmcGpjFbBkiDKZIofGoLdoa7eLltRIkCMzENQn7qMqeV7KO0h6ObKFHRxVZNjA6.w5tJ8xKVUtjjQyCi4wZU1PN1GiOrk1376jXsa7PYoaGsaoQUWURQKamyCAJFkX.Iej.noyZqYh2npGW7.jLN5tnUS9obwUZfBvxH3is1ekklvSJCnrywbP5XB5FeA6k7YOLJm74Wnt40Kn7ffTfw_OtrOpn.upRMeudaRHsrmZtw6v2407uJj5HZeEqSBFGMxUQuqNgmLMI2oq2UEU7kbcmJa_oNP6hcEFtFNXlDk85s_wfCtAuZ.aSQuvhMMTG7gBUiTU7ZN_eM9nM5FtsuBvMBJ5qPRw9iIBNSXxnWKO3VrENzYI3cO5Xe3eVXAuL9BjkW5AuoBjaEnHGBPN.DTEYs81tFLhQ',mdrd: 'EnjtSJ1hxi2vUfxtdG.7rWAaqkczNDrZJ9fR2Iu7r00-1768264758-1.2.1.1-ab8d4RwBxghTH_kMwdVKqN0NiqRacf0hKXts6VeqbEiYfsLR1GJNhoWoc4EG7FhVI.Iw5wpZE36L.NneUNmqBjv88Vw0WFe4uSzuqWZ66yeAgG2wJYKz22COHME9ui3iNdFA2qE.aawhISPaYBMiwSMdf2NE5iPrpD24IBh28GZBl17z4En.b5sopQy5kfCG9nHORyw0WcPReqhUv4neh.etREVlhkpiOFcZUlPBpmZZKRmxP8PSEsqtYjs6t__q7x8710XrTGOOUNIjkQ40Ds2KS2HZ_Bzr797OTnLtaz4IFAOJYGRaNL54gRHXJy9t.4x4G.ru6pq5gf4mnoRmBrL5JFx2IR5XstUoB
Open service 2606:4700::6812:7a2f:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8716
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f718b93857"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f718b93857-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f718b93857',cH: 'PEvE3G1YN1JLHduDomT_SpBTm589D_q8.AlVNg6goeg-1768264758-1.2.1.1-j6juCOFPMqEyHzJ489jeK5UkFZfPwv0K0.WiLUFcLLTA2FjbQg79qXblJqCY2nhI',cUPMDTk:"\/?__cf_chl_tk=TxWW_3TEVeOATFNue67xZpzjXYuBOQ3BA8HGQMHHxEk-1768264758-1.0.1.1-4R1N4CrNpdrUvtU1jpzd2JifV0oiOBjMRT7hSHxV5IE",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=TxWW_3TEVeOATFNue67xZpzjXYuBOQ3BA8HGQMHHxEk-1768264758-1.0.1.1-4R1N4CrNpdrUvtU1jpzd2JifV0oiOBjMRT7hSHxV5IE",md: 'O5rN1QgtxH4IFwjN1DHG7EmVmiZE2DqeDhHI8kV3f8Q-1768264758-1.2.1.1-.NiQfi5h9LQ5ZC8OxmEQUWM4qixbpp.jHz.D4GHXZXCvmAssLgCX4EbMpZw1byzSmPmEV2M96VYmQuBN4E7sBNqCuuMyPgUzZ2chDhFSLAYGv4yYed18mwYpzxhlOoFc45eyYN6PINXfcTNlFQI.rI5UJRjoQLzJeyAuQxq50VBeQcPUTYJLsCifA8hcThT01qAYbJJ7se6EUYdaJgeGgjRapDTmTXRvR.iNIFxjXJoJGKf3GjUBlEgeW.9PPluCq4nAscZ_Ce6TOsEZjbwpYOqGk2QOvWsVs9wpUsUT70IFX4E9qwpiguHop1meYt1FQdm2dgLCb0bnSnmFu3xoSiJRbGvPAcG_u7of_kSkB0MVg7427jxC6ObSBOH5hiAgbyinYdlqhunU.Ka0Df60EimTJ7BIwei6n1KoeUG.QpT.YyvULlvpDndNowTr1IyyPhfgcg72whR263EcpGzUIkkS90ViUdL3TNtoSZsJnxrUM9raVBeB70e4vwAca2FCT7eaJhUdoDkeBia2WQH9AZG07u8wXAZyPYVhx0XPzLJ10rn.M1F9xX5lFrDjJVObMKUiW.N4oZFzMZ9YuI2oYZNPn5I6IdLtaMOHc9Wfgt6tv0j3nk8itcwoQBlDdg651dY0dFuhFxb1dTl6uWjAtNqSbW9lS0qOpRpjmUPmpCJDYC8YSWmWJ9C3MMaJMPGzroJ5Aktiq2x_eArKb05k8RAiKGO1Hq_FskWw8E.NucC7EmlW4MOuvNlcvvrYAl2oL8fcaD8QdCmF6qG7WjCBnCGGOp06mVbzCBWeyZHCrGBGb.Hs32QDhA4Yk2YzpPbvsF_blyilaS0Fu6OefFLiUFTarU.DehTwrhaXnlPGt67IGjogXs1FWj3Rs8IE1C6trhR9RSyEEQYjav3Cngo4XojDcnTIOM1LyFOSq27heHnolQpzIjGaLuWUyZp5_UjpImAneVtY4IB.1p_GPHVLdr8jea_RvUXfF42kMfxakhmgT.Z5N6cLbmVelR5PgloEYU4X6ESZJjnEWT.9mIHA_A',mdrd: 't.uYl_mqOguVvUYSDBorZ3UtHpj.hY0ziKNo1yPg4fM-1768264758-1.2.1.1-FhaARW8lYYvYF0LfHm15__w57OZNgTut7QxnFGu7hZGu4FWHk2LHq5cmDwOQkAVaeGBh601G4P1K9MOn3GmeN1gAdkja9z4E.ZHdIXLKGsJ44oG6FMnBjNTNFCoWF5QuGZAme6zIgRIGaMC6i563M8_E8RMAbNr6iUs8d4h40.Qii7pmRr00jj7QrEuBVR40gmWsTfrKapEUHZYdPJ0kUOTFFeebvuzPRbubPKpzf07wE0pbMOOJn_PWq_YX3fufORAG3VBESefp0IaZwZPQcQsxruK.bvGdT90MiNPEqWM25PzHgystuQrV0A_yUQ7D1O.1qpm01kwOh4sCFjhRyfDGJ6dtsLpevJcAK
Open service 2606:4700::6812:7d2f:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70801fff6"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70801fff6-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70801fff6',cH: 'ssRzFLoyfkf4jWRF.m84yv3yv7CgcWwjH0LtdiuU8xY-1768264758-1.2.1.1-ql1l68lfV24CcEBggMpXHiIyf.e4tTw4PVKSAu3MqbkKlYwbP9ZtTbt8DvnZQAXb',cUPMDTk:"\/?__cf_chl_tk=Zzfx3YGoHXPJ3AEoFyGC.F7YED4__iLEZoAKJu6LfuU-1768264758-1.0.1.1-xsghAO05rMNvrZJ.OBdwAIhFYP9k1LYGrIgE3k9ZyM0",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=Zzfx3YGoHXPJ3AEoFyGC.F7YED4__iLEZoAKJu6LfuU-1768264758-1.0.1.1-xsghAO05rMNvrZJ.OBdwAIhFYP9k1LYGrIgE3k9ZyM0",md: 'faNFGT1FKK2k4RErbVhLovKlD2DX0E4p4RZ7_HsHSW4-1768264758-1.2.1.1-5XGHcS.cjMzakHYhdBeuzlax82UtIUqkBPvA05fpxgV1KlUJqqpjNB._GouhDL3k7ADgH8h7kHbLKNaW3vvYJn8EaGxM9s.nvTfeUock4LFenUdra_K2_QClvhZATIorZP0L.YG.3W_s4fiR3NyTuCNLar8Efx6KCrOdt_gHsA9siKb7RRha9JLrouwvXF.BpLiIMWhieO8.EcdFKPF5LVI5p.EhHMdzbfTrdyZ0LbM6O3FAdhJRWrsQJej.pFvA.aowCX_9TUYFIlINdlx78wF94mU29lHva2guQcI4DINU9JzMxElzY3cbEyqqTR9jMxns26YLlVbfyI9XjeINS0MV0UO7NOwv_bcRfgAlz6vttuHG2Z4FzokOOxlXxc5JP6Rh8kwCKTs4IMSR6KioUhb2Xg15JhgDFzmyN1EoZoKIe7ux13kaydxfzJnLZmHnkntjDOS_ctXvZ3ENf43IyXNBv.iIwSmhcIq5z5BhiKPk82i_ij_aZ6M5rx7RVCANjbMlnf0jGCuK5XYXB7l_54wn0k2S5729YNt9qvzy.RuMqw2flAP3jQcNhs09LSJQBsSdC1p4.UgarWisQnWl..bZ78c7DiYoVveiMVxKwV9toSqsZG6U9kQwk5KrRv7krZhSjPlRe4EZLvyhfCtSPzUhfEfIah6_sGjJspZRvOVJP4P0LZ9Bxs22B0WWW8NyfQtOz0FQiPCftoludY4s8AVH1JBQ6Ryr4IysztVBjw.w1OEA57fY3sN_FASQ4cfp6fEl_Gf3kgIz6jNkLGqzl6GOnD9h1gEzdQt_Wxa9MTIAteWNf5BJEFW1HdV0obHWzWN_pwT8kwuaT.xdWeXZ7kzdR7lptBaveRdi5nvJptlv4Fd.yW61D2QjBDAKs9bqZWWTHiZJid3arqSDylF4EywMndO7VPMwBNZocZKB9kZQg621G8n9ZLILHoD7cwAHrIze4GjEIoS7WQP4eZMcZcKpFbj1xhaRnQtvC7Qcnj_3FnfZmtSG23bXDQpWs.2cp6BZ72PW1RYNDj9Yv4eo3A',mdrd: 'Q_9UwbTj7jbnuN6mxUyuymyL4CQ8t2h.HceYhQ0HvO4-1768264758-1.2.1.1-XZKOD2h2CriVjVPr483PlaWfjIAXR0DXZQjJ9QEi8tr0QRT6TeMohGZBQv8JVhpgqZfltLe8YcEbOQDldK6OnhqEeRxbm03lxJOLk8SI3CSazFcttk.saamUfqqiloGwVyWKk4jQGQcsDUMZrvT0NEvdZDVJpsMHylewOXGQSVv5oe0eZl2T0CDOHJG3WUy1qth2kJLBuJUV11mVgU_DNQt_oi6kV0lxnx25JbL3CHZLEciDGuD1MSv0dOQPUtgWv0YMupJida6sq86xkglA3XVAvBCPFduNP1czCSdkFW95EPL0LqY.0QJZAmb0912xucECvIPtNxzRB2i_YTTPHmG86.no7hpQorr9D
Open service 2606:4700::6812:7e2f:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4526
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f71add26a4-LHR
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f71add26a4</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2a03:b0c0:1:d0::e05:9001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&
Open service 2606:4700::6812:7e2f:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8695
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f71ab3edf6"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f71ab3edf6-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f71ab3edf6',cH: 'jjXA9k2kUlYE.x3zVnXXl4TtbR.bNBMuBWLHYBFFaPA-1768264758-1.2.1.1-BUg1I.vLNjq3Tw3VSVJqTahp0iyyhH50N5kJq5DFjBRZGVTXcJ3ASytQ1wLfqTcy',cUPMDTk:"\/?__cf_chl_tk=rDfuwA5pc.mGsOgBrnGWfrR5G3GVX4hUK461B5NbT.0-1768264758-1.0.1.1-YNUfjIqJHxJ6aVfc8_yNv0p1UczXkemJFGsWHZCIfUY",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=rDfuwA5pc.mGsOgBrnGWfrR5G3GVX4hUK461B5NbT.0-1768264758-1.0.1.1-YNUfjIqJHxJ6aVfc8_yNv0p1UczXkemJFGsWHZCIfUY",md: 'uVDFWeTpqHL3xFRIeLOw6WWoIIs5xVB3LCm22d7o7.E-1768264758-1.2.1.1-UagPey8WHkqWr16AyA5uyIYMn8QnVMq2gYMU.PMPHkkt7WhMezo2T6OcRhtL_kvC_sa5BCfXuSiYsFEgFfDy3u29Eo2HraX6BZPDwpKQ0jHfHdhpkpIJldAYbCzCAClQLyXCjboycZqJV1IQJcAOhlVA4xQnTgdQ17xZaP4.Iv_wnhFlS96mfPQos9evsmaMXZEjNkg19thfksSOCHAjXaTwnhCht2FEt13oTX2l16Ltxznl0lbsLvuaqPxc6i8RTTRqMXduxDvVx35AUTDeozPhe24SCuu__0uGP.MRGVsnwPyBPAtUXPvKqeOhS09iXBgC3zoCD7fH35KMU9LBdNgk.sZAkiMLXpoZ6BSug_BmVSqgYjDACIMHDpXNq7MVaPS6aXh.2zcOt7NZQrmtzhCJy6.G2wKvgC59k6d3Ya9U7YLTprhWoE97RNHVyv001iO9w._kTUEBS2GV6zY2Yus3W4sR8qmBMwrbX2_VD1VkrHF4u3UU1.USPib0am_pMlQjHxP558eIRDV0_n2wctPbLanmhJrQTiM8hLFRBL7LW4ayZKvOU8A8GwQuIg6jpyJWmOZfwJyuZuQnSUFVSAKVFZ99VKjXIZjmwJC3ZnIol_56IJzCJlCFYEUCCDYqIIU9CWOfxOKSLP1EIMEKzhaJ4GEuUG3kw01z4CHtQknoHOyw9PnK3elnWTqTjjycTmJDdwAOPLkxhrcYkdGz1ePX_D4BMABLF.ScXoQrYc6.Xk0YSfMyBzvw.u2QuO4SlOZGy4.vGWjMdfHKDP0j2K.eLin2Ypk8I2SvMaUrJxIsnAMO5y.7ZCP09sV_YqquAOAgN1QoH8mT2JWAtubuxoUirEx6i_gJwgmvcuJh4Qb4wsUidUAmDbr7HbYsaRjV9EZxcvZCHtoXMLETdIvU4MYVbhHsoFsi_Nx6Xy6AR.PVOJqkELj_MN0RW5TA1Fr4UZ9j_pwdq.roHLnoZPKWvKtshQj.KLJO_lwvds5OjP8SuDsadRlJiTdABuXoga3Wj4bE7DNhp5NhIcHWCDYFDw',mdrd: 'qKq0rSRPdvxykxLpmsLoEIzLYPd7qZPCDhTbsyBxR3o-1768264758-1.2.1.1-NKrw8G.x9HHR_6ckhcMN02uNM.yiVpCIJMolyauFtJ6DYZhakxCJz.r7Q_5wxLxFBvWP9kqvPCWuY98zYLjM66JLJcaF_cYnF6y8tye9spCsJxeFNIv7a0X_fszW3ZpAS0xNdPSEhFQr9UPrexBSVaomAXTa55hdkkzNtQCRP.iONNBqv6Cx_5YNFypyJIGKtQ8u.vo5pSA86tipV9J1l38q5n6RTh.5mQZsxQHYzbUiz.4FQLrli.Lo4I4aN5xUhLS7IYIAsrGymUREUhXL4XnITsSt9uPPtKYrCUEulMH4z0.zxH.dDmtJVQVWbrt.cn8cx0rEzNVJfwmm0odEqX1tWOfvw9ACIAxp9
Open service 2606:4700::6812:7b2f:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f718a20bc7"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f718a20bc7-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f718a20bc7',cH: 'il08c51WFRaA21mfZTb.r6QeeZ3ND.GQlapLhLLYCBA-1768264758-1.2.1.1-eTU2Y8oEhGy2lYFiuA9bJGfBneIMvu2EbmHbCsU9BmUUR15fMZ7Q_Co0QlSVi_1j',cUPMDTk:"\/?__cf_chl_tk=FuocdRW8YjgvliiglNA17pMra80iVbEmFekSfCeMUZU-1768264758-1.0.1.1-S0rT8d_49b3HFDrZHwg2JzD91ZusUfIAhappCii4Vpw",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=FuocdRW8YjgvliiglNA17pMra80iVbEmFekSfCeMUZU-1768264758-1.0.1.1-S0rT8d_49b3HFDrZHwg2JzD91ZusUfIAhappCii4Vpw",md: 'AXGpeH6p71F49LCaU6J0FC1ik.mqsjoZxvsPxl0RjrA-1768264758-1.2.1.1-yFsQTTCvmPuRqftJUM2ikjyKTEfD6GZPVwKK0ogQbF6gGUm6tvsZqIvhTKBhATeuj9.Q.gg_Ri.sfV3wWDCqdEXkqpTNTbwjmrdnDEXP0URh18GD6rFxxUJJ1tqzChB3.tI0K5uuyK5RoohlYlqyc0SJ6XfS8_jpViGPc2pAhzfWKA1ioB7AUUIZBBUkvlDt86K2GIOra013dfcQ2O58msEyxOxU5SXWGi_URhtnBCKJdDlN7_.AnXpiWssvPe95cVlk0e0EuHDYQ42E1eovVyKH9RVvRX8QE7XvakF_q2dp2SlX_0ColWD4mdZPeJ5EbJIzVd7AuWii9nDrw_lebWME.ssv1PQmPY4WH6X_c0i1rtc4BO23TviyD9FPI_hDFh2bCT37vRp9KNVBvIRAHH5laeIwg5QaXiklBDwP25Ue8bz4gAQMti.C8KI7f.18pMayLRCk1jRgNvCR5FKhuL1gzxjiJVk2anT8uFN91UMEVUlSyXHpYCS0gLNYvb0X8bgSl495iSX2HcgPHStN8l98depzECBX9.E__u7WaIuNT1z0MCXLHVZhWOJswANnbHHKyvyR2ynF7IMZ.Vge5QTE9GHZlMoIMR6mInmxfKReWJp.ICUulkVQKL39AywRW9n.1H5aO5o.CjqidfhtZ6thuQyDDGh5oC4NTSvtx5A5YXSwcdf.pXWuYwPWlvkCsgrgBWeeTuh7fwugWHCSV9Q93J87TIeF2e0ZAyMUHJrR.qam8i4xiyDD62ErXQvzCHVnnb8Jo81Km_ieXsYqMxpYtgmJf2couRNPO5HDiJvbs9XHFown5RZ9qZrCPHLV7GNgED9W39cxhYiOzsFPXHEEPrUi4j4tx5lPVPKTxF1vrDWVsw.jQ6gBHsWVsJ2lp9zX2HOJ2qKuPEbfxfG.KoQhX_HVcqqI8NalsQWbmnjrVRM0NI6T2XMqfXjtQsAFUqY1_23fjC6ekQd9uMiwO4eIbe3LglyH503iHguVp98Xmyr2BZeq2eF_OdDdiqLxjcxueSqFW0I4sAf8bI81XQ',mdrd: '.AAjdjBBPtdnssE7x9XDbhuXSXWrx5f.Ipn7OVt2D7w-1768264758-1.2.1.1-KOtbtTXkYWxUAL9VU9Iii9lqIsAJTUAQkDU8yLSlW3iThIXiuGnS7jEC6s3KiwofJcuWxM0UHoyPjS8JapalCne55ivleIoU_Pb8ZnE_yYEacQuW2EOvAxGTSECNrAOH4BSRmQwYJn_Ghz2ViQunHO8vh.4Dtk8zQzR1DVEJqN4j6JNxxZ0T1o02tScxauuAClQrUGjtXR1_vEPOBT8_96yepL2J9LqQsVUFyLwepMx445kq7cCuu1Qj5gx39a3_Ff6R1GOZSWTFviSymN2ASl3kxDKQ2jj.aeOLBGgCoezb7_AoC.j6qatZxqQ_lr_8tsFWNZepHyrWWNCwbWoSJmmQpAwolsZhpfvlz
Open service 2606:4700::6812:7b2f:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4526
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f718cbed0c-LHR
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f718cbed0c</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2a03:b0c0:1:d0::c59:9001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&
Open service 2606:4700::6812:7c2f:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70e0934ff"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70e0934ff-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70e0934ff',cH: 'P6Ok4Hyv5tSUPLadauEfr0FJu6Avfok6d9aeKNWK4UA-1768264758-1.2.1.1-Sx6W_oNrPZA68BKISVX8Xm87Z0xXh3CU12O1bX9ATMkkz2oIYlSYseU4WZmagKQ7',cUPMDTk:"\/?__cf_chl_tk=f3GMpvfNE5LfUH_9RTQN7uGeYKhvH6z.zEXBknbfqqM-1768264758-1.0.1.1-ZG54y0yfC1fQpHM0aL6AjVGOlQqrbIW6afJI08eo3Hk",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=f3GMpvfNE5LfUH_9RTQN7uGeYKhvH6z.zEXBknbfqqM-1768264758-1.0.1.1-ZG54y0yfC1fQpHM0aL6AjVGOlQqrbIW6afJI08eo3Hk",md: 'atvs2sMIugm.8mBSTfw5jmedyLm7uPgeKhLVEeOSiKk-1768264758-1.2.1.1-NcL_rGXhoBJVtr_0xKqZfCCGe4ZuDp_dP3O3.cwWme160DJzrzDyu2kcCRtvZ159Syick4j7xIqO5BAWvpcpIQGbLlcMpq123P4Ka.qJdeyxIU9GA_qAguwOrrXQnsaq.ewblzqCEc4Lo1IpK0O93TJVBR_cTo.LpmrGAV5DLLyynPxgn.TA3fb5jPiX89j2QYOQYZdE891nPBan2awtgtMaxuFm.ene4ch6uA2T9lx5VPiko4QTrlzlXPJFzTq5z.StABqiIPHwo5PERbVj1ZG3u7AazieO.AQKSoIMiUKPk5zeXtcOHVWswpXEAbYaa86tna28EAeK_vYloeijrr3Bl2PexyYVAqjgViQMjboSRr2jad2VUpPuS5nbM.xrtNGxgSSGyB.jY608ITrb5PTopSnVDKwAg9m8GQG.8jAUuo.ggtagXhfPc9GfiWx6hj9oEqdCzSjq3dwODbweRALuNBMCJbJFxKjvD6YyZWqYcYldETo2QMIWD7dX35756kngkpz3yVrQFzsgHvsXpMi.oeojmWKLFKoLB7nSgxFV0XqlNcxv8IohlNUvFVw9boVDCDz_tDDawK9Bm1k85Gv9SVBB5Mh8FEEoILcOjK01gjhvcL90CLAKXvgO8G3kaIGCEbFhy.8Ov_9snqvM0kDJYGzHihw5TbvP9L.hZEXSDvTMhuDcgUwszlYyiM6lUdgVK.A2u7_kISV587tAMOPonI1gR7cvqkXJZRAM7NedOSQyxe8mAfKTxgLRnTw8Ez3VCILYr9LMx7zsS4vAVU0wiA.PNjVK9VLjO4jC6SwmmvxuD6axO_QxOokvJgu0Rl.8RrUPwGqzDHHeHuxpr1XJev45nA3qP4mzfpBzMnOEeSRhigeBhWAvIo0Fwq921Mu1h3z_A1gCem91aBLBxeB8xxUvuXzS38KboWt3ZAcBY1tLbgujopPA8GYfX8LtjeENQjx2hxhH2BkQ03b4ioe4Q6dVgRE5_MzrCZFCfzjlBKX4Se0GxJAxQo3yRnEH6Iftphg.ytiAZQAlPJjE8w',mdrd: 'i_L8495Y1066ocM.ge36x7m6sScjo488IwGUOobJpX8-1768264758-1.2.1.1-2GtINlw9N.gLUb4PyL6baxAbkijG0MZjBx9B8F5NXfulykdeGy3vxU9Z7YF9xsAdh_QSluPMQXmHC330bZ9v8ojjDXR2SjRTutXn7IJ8.vW81iqGWxwM3Vt9vr3R9f5.8NqDvu0jGYHo2kO.mKippIx.yyZuXC5MOY0NIwCed_6qwiMZg2pt616eMOigGWx3Fx40xDDimgLknJOr_Ky79MO57ChrQxcwGMxudlLw1C0hVjRQJRSg0b2YJqYktbD9ZYP6RtHZRNbwRxS6_px8RmdwB97Hr0kKBlKqya90oTBOSg4c_W1ZXFzYpZKfFWL6TiOavU0YxTMi3mwearajL16Cgd9OAXhHFtpXk
Open service 2606:4700::6812:7c2f:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8695
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f7094cd179"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f7094cd179-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f7094cd179',cH: 'icN5hOBoweibSE5cAXZGSpqTA6RyHi4ADW7PIUCrl3A-1768264758-1.2.1.1-YtraWNNVENmQ_QpCrqcOTEOJOMOQI62JOKOAY8iE2CWiII8hMSJwRj1_vSTSL6fd',cUPMDTk:"\/?__cf_chl_tk=p1BdSXjkIvNu9d.hRmWliT3lq8pkJTKgiQCtzeeMZcw-1768264758-1.0.1.1-gnXXwhxzuL10yO6vaZDVVX5o96xyWUcDgtvBMgoYzo0",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=p1BdSXjkIvNu9d.hRmWliT3lq8pkJTKgiQCtzeeMZcw-1768264758-1.0.1.1-gnXXwhxzuL10yO6vaZDVVX5o96xyWUcDgtvBMgoYzo0",md: '7VeTaSiVhmou.q4ikxgMl3l_CIt.087jHVZ4bCAN0Eo-1768264758-1.2.1.1-tQUsPcPeyCVglLaxApXCv0cV6l1i96J1Ry011HMxa6xab0cgkWaXt2im9RlbWTu76VYhvFfCp7dXuo._UQNinaKhnwCDptG2CTXgVseXxujnovTAMDC7WDQAILhljLqJzg9WPPgn8jz.gFCL6VrKyCaBRvVRtNk215AxYEBSYxJ9nnwGqQ5zJvouRuuCgs9n0glCwIRHlnyYDIxVIgc6sa7QEsuoXAzbtaEVyOLr8IsOKuARqjaXL5KYCHiRyWiLlOjFYAudM4SBtIs3rutK0FIdJm4cDVhncmMDOimnxw.1RUKRFI93XQmC49k0CjtLYCb7W.C6pRxxen5bkkkEYAfhrB9psKN7Sz2rEyNzfw8mAMz8pxEWKwO7v4Qa4wZquqNIIOCStMPeDyLhdn4Aj.LDusx74Ooxj.tztWish93_iteTXpsQLE_TYLrsbfgWAgkq_eJyIrsRySi3VuYdqipdTKULmHVdZ5Hwg6DQxE_KoSyw0K9g4KpQ8MEyfjRRsft9bEPLftzvivJ1FcE.CSe_H6UfzA_i9XpDlMr_MfMiNsFK0LUWjw2BDArWZV38sgyBBe8O436dcePbIIqdh50U5DNEPcNhm_25V9zlLaPFe09o1Hrkq11lnJGeQDwqF68WsuIkDCDPNEz1ONdUOhoLye1Dsz6MIr7tQNmZyDhigbb1BgOP8X7oruIltDN_d0x41tGBEl1wD3pAyH8BtSxI8RyNeyl78O0a91qUvuqluf.Z5GH5hO.TS3BYFPXKAQ3rR4JxGsAXLClfYaxQB1susLaELSiPAm1CBGhomjmIs8eBLhHB4zE1NYklBS9OrWCzDRccskpFRGSTvRGOiVDyzpwz9iADXM9hNUV5xwiXD1aEVdp3IV4nu1L48LqykS_7XZj0kDKkrhnVbbEpIps4ZOLPrgc5uk5Scx0NK_u1ez_2UbvINYcQJ7XPBXhdKGyMhFOAcUsEmfooxPR9OB9P03rgCmZsdfnYVF7ytKqGeWH2HtLeAN2hFjomTlCIdRzQ0tC_ESgpYzFEDz.RKg',mdrd: 'apze6yaLv4HMiUMb585cHIkcSgQ9PtYZfSO4YezbXiE-1768264758-1.2.1.1-aiDOXz4LI_b884KzX.6R91v8BBisFNFfHddzlWNWjv21x21Wxgf_SyaO40iPR4cz6AvYIoonL5BO.ue8Ynmm99A9OP_TY8tBcRYcuiNxKSngsYetjdK_E0WZl8Aq3y2UhGO6paIkLsT93dvVJHPpn8GGNFpXrYR0qWAL8YcgRjBeJKbDdvIyGYe.A0UK_5olCYxNOmzBZcmIGNv6deb304MPnWMEDkGHCdRnO.rc0YsyKy1DgkNByaEIfKzTQ92IJTCRAj4ak7SuD_tjL_K2AOw7x3veGJ6W6I1oRkaT.G4v.sZbBH1N7WcPjGrGdWDIZwjA_Q_jobN3__90LkaRq9ROfykkY_4jqhm0Z
Open service 104.18.123.47:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4516
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f76c669183-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f76c669183</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">46.101.111.185</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLi
Open service 104.18.124.47:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f6fc520bbf"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f6fc520bbf-AMS
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f6fc520bbf',cH: 'xwyV77SK_G8oByTiX6s4SSL0PqhA2nDGnBxyzRVnatI-1768264758-1.2.1.1-8bpUy2FEzWTIZmCJvG8wLyFaMihvcEkq5ZkAt4DcZouiNFlZilRmPgDk0PG7n5FC',cUPMDTk:"\/?__cf_chl_tk=ldlSGa3MVtakYuP1fJtO4QdHJ._RuUM5MmeKB3pQmL0-1768264758-1.0.1.1-zlyaqoPneI5GAtJ.W2syi5L3kqKTOuSn3EJBl7m8be4",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=ldlSGa3MVtakYuP1fJtO4QdHJ._RuUM5MmeKB3pQmL0-1768264758-1.0.1.1-zlyaqoPneI5GAtJ.W2syi5L3kqKTOuSn3EJBl7m8be4",md: 'i1v9Oj8rFQ9B1MGf7xbsSR317wEaJxPOYjIxsYirDys-1768264758-1.2.1.1-1KQpfMvMBCCO3ueOgKU1t2QyKchncvERQtYyYM1Z2FuCXyULpcHfYzB_7b_j7VyDYog1MOHSfY.nmwPosA4DfnBoCU2kiwWZekxvShxz8b0udB2lPzSb_ndqk0lHLj_O6PO5QvpjRiPMmqn1i0dBh76dYI0s_l6OwXAXnq7lAOFpJd.R1aFn7nCqEsEYLDAjAjMZtbESsvzG5M9pr6z1NIIjFPo.XAY_wQg9QXVf.VbeVMwj0CJEnel.blWJk2zef_sRIyq_EEy6I7qDAQMOYYo_jTneZ83k5pbnU6HTs_xSo3d9V5OF5yDQ4crcxJKZB0HZllqTt9xfCJgL9Fbwz9z1_DXiZFIhiy0rRBJOxUdyxp8gB5YiAqit5QW3K6OvTm6DefzXXs2P.2to1GvDizu_ecc3cY7OcJJsQZIvw.V0d7pXTElb_2n1v5NsGhsiRPJ526e73TS0sm0LPMdbor19rh6pB8OIv_.mUbJq7N5FAWMacY9ioDun8c4YSupIPXuACTeUskdpXOm239RqtvOo.tWjfi0iZ2sS23qHBxrWhAQF2zId9aapWMhLaNhfHFlC7Ao_U3ZxTx71dfmIkkN5YBtUTXXKLBbJRtENtXGgsCa0oYEttVvO7l0tEHEflncZkvBervKNQhumjFb66hdxhVYVoemtb4Gvt4E2D54ZJiQy_ehRmpdUnxpyVCTMX_cmSmJhVFbCTycJvROHg4uRh.uSzG7nXGCU_P07U6.avfdKdrUFHKH3LAgb10m2.C0oXPoLFCs6RNIoR49XptiorejEYXrmJZgLiknDugLqjKpFbXi_yUz26UIAEQchbcSpuLT4v9Z.PCWgEgO7S8D_yqfEV9MARsYSvt61O1Ucj.dPRRyONrqrzsiLqIdJmvAKSCFGNxkgG0X7WFjUmGpCJTiTh0fhac2DVojSl9jUiCw81uAD4Fyx4a5E_IqVcWRi0JP2SgkHK0Y_xM7BuMNJDrMaQVmVisn0x.tq7UI',mdrd: 'zCkmLHTIUVMmUKFh6h0XHqHUjQz6AC4uR2VcVHrX3ho-1768264758-1.2.1.1-4kxtN3qSChc9U31oJVs2HDD2HvPuwwc1Z9JjaJ4a_cyWfdBbhy4hSOKZ87k5Mc6b38SvD15V6LOB.ubkgm3LyifI16r_V1REgB401M11j4qDtyPA.HKyMYtNgaRVY2G2by.L_YAmVhBKgB.Qr5v4c2TRjU6BTvAMuRyx3z7Ac690gVIEM8blcBQ6EXfAftol62skNykwhBFp7B09mWi8CcbQO5vo48rSMiiZaeugkGgfRX1gI_9Ts0khfAmFOwxDvY3OsFhyX9wxEHGHdX8vkcwbsEOP8G1VrJwuHJI7cVlCcwbcuGrp8w_u1MHux05Eaw2n3vqgbxhNTVSdgi3xS5BNvrm2vABuBAISlCR2rTqouQInA28SdDgjwcstKSSRarJKxajmnmEzONaI
Open service 2606:4700::6812:7b2f:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8716
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f719ad9186"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f719ad9186-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f719ad9186',cH: 'dnI1Lh.XkgVflvZilQc.jY7239wgjVnsOq4s8aIXCtk-1768264758-1.2.1.1-BsNAxcOi1yNZXTIlFt9mW6667TtViB0uOmvQTIWU_uuzST3BZbWBxKQmaxcsGGez',cUPMDTk:"\/?__cf_chl_tk=FMl0iifdDU4RnQCuC2K8bRh6OYdR1.1Oa2IqahOxjTw-1768264758-1.0.1.1-giAc19eVga3KXXogf1X5Xmzf5mazfHLBXUw8sYhs3Hg",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=FMl0iifdDU4RnQCuC2K8bRh6OYdR1.1Oa2IqahOxjTw-1768264758-1.0.1.1-giAc19eVga3KXXogf1X5Xmzf5mazfHLBXUw8sYhs3Hg",md: '3HGQbKOFEUG00KRQuiOgGnQv9R0j7wqz8yS7rLa44jM-1768264758-1.2.1.1-QImLyoyY8fX.uZKHX7kcIOneMJvOv42bxcOg_uYltbKqyXPn93uIhen9ISzoFeUtUvrFvhvS2m02e80CCT2b3z.ydPVIvLwIC3SBPxPYRs2Kg7obJSOH3mFwESK9EtUnetNwULRpssv6bR41bEsY0fuagO54YuL68fhkYr8IshlfaFIRYM4rnfXpmIKNrW6.1EDyGKY_OxZcgbCcliqN5mnI6v1bV_xy3Pc6g9QN1uE5_mmJvNBoepeoVsG6jVT1tcjXaCBRSrGqRyfEMYd5PpWAcSw0O_rp9KoytbS0lXxs9u8GmtGIad7D.F9wJgGsPii8.rpv.Jbyw4naBjwJIkHFem2PjoEJNY8IXeqNlSIv4y9mPtgP9g80N9CIiYZuPPT6ufpxHHG3MlVaalAb7bpYwjCfN3VuDULGUqJ._1UCUj22ei9iP22zw4vx9xCjNZOLl.xj9jSVYEcZXsrkY2xYYim.M5M.YR8eSGS7J8aSfA6kJiv9aExKgbcK3K9DwbIlYxWDU1u99d9qvf96FQphsR5OriU0hzjxgFDUNXr95hdW08c7fAn8XctJg_YkFbrTZ.CGvHPKw_.tRPC8MuNAavtuw.Wm1G_i1K.Cz2Z4_D6hIO6lThU.5g_eRrGwwkgo8za0MUKX047VtKBp1oPXkt1T7iQo201Rm0dg7ZsrTzu6QxFdrgVvr0piP0urSEtJm9zqc6mTmOwcWBmZcYKSh3KQXyDgpnWVWisps74tKd1YbA_pMTHPYJr8An1F6UCj7D.owysPjpGoIpPX.dzBlMl_1Asf.NfaXknw.mlY.rujPoqt8OjI3bkBaD7.4j5_sy7Dp4Iz1RdqODxdmPK96lWJnCKrQDUeaueSLk12rTfYgZ_WTLMrz9stO1B7SuT1lCMYhJDKw5ZOVY3Nzh4bSPDQHVnJZT5AlUmMyQraDxxepSoW6rPQq7RY12vBXqxFH2fhB.FbMhFKCmSLf8quWfQNUIaSXKetwHDVCWPxjBh3c3DOXYxiHPb5T5jioNiyMF3_TtgAO4AejHYwAQ',mdrd: 'tMbzX5sbfhuziToEy.x2mB2ImW34Flz7oUpK4khG_HY-1768264758-1.2.1.1-9cl.8VObJZS9XEVPNEqvBcfahGiv5Z7RU7tjSVf1UYoVTS2uEKSnWkk19l4Az8yUXXQXVnu56j9ZQsoKwxF7OcWngKn6DZEd4u3G5hgt3DIrB69HS4W8gnX5IQoDHEXw6712upSwuy7e8ScqASgVUgBpm3MD1nOdg1xzOJNQJEpvBhGNkdSyUSueajO7mtUxkFgcDNMze25wnT2HOEasepZo8_fNY5l_z70GMtU1rf6vt0aNBdZH0LI.Lp1Qj5slQQSl0rLV9xUNK5Y22nJ.UYRADThpQGvYZVMmu680leTUK4JsCtoDZUPJK3YJq6m5hEBnOl0satcMjZg_jEF6oU6OU7V8IRDy6u85K
Open service 104.18.123.47:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70e6ee570"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70e6ee570-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70e6ee570',cH: 'x52Fu.LPbRZj7AEQi11hNAVnekBHYdmTPwwCULXDmhs-1768264758-1.2.1.1-vJxy.wI.TT8HR7DQ5FopmD8D6PMahgmGNpFGAS0zoMeX0L4hvWhtRAXKKJy3yWXq',cUPMDTk:"\/?__cf_chl_tk=nJCys8RPeB6DcNMBPfHVeozr2RmcCysYxaeLuAnl8Eg-1768264758-1.0.1.1-9Ayii_mrG.RA_qExA.VLxPDNcJ2juOymzPxs9tpZq7c",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=nJCys8RPeB6DcNMBPfHVeozr2RmcCysYxaeLuAnl8Eg-1768264758-1.0.1.1-9Ayii_mrG.RA_qExA.VLxPDNcJ2juOymzPxs9tpZq7c",md: 'wv7i_CeUrGCBwIyPJ3RYGNsiZWwccyG94l.Wmg82Iew-1768264758-1.2.1.1-gIE7PsGkOVP_NBIMO1JgPhSmKQiKRfQP.xXeREKh948ZVD6Aqvb5aDmOMBwrFx1HHn9VHoSMDoB8mUWfgVW_skmpgA1cUlBRb5U2kO5VB.XiJCVkv93EhITZaXtyHyq.892j8ZOZ4aQky0vT_4PSOhwVguzpGrwB6DcZmolTEH.QDP98hStv4Q90VGqWy2b6cckYQd7VlQm387TIH8hqOpseAPQdF7FCwcPS60YP6K0F1Y7cQWZjoZOmqmuZyLPI4OD9aM3VRh.VjyTL7ezhFGaetToHGJy8KcbfkpNYj0vSYdiTjoRJt40U3a9EwcvNuEYUeqUki5w8xWy5v9xH8eMfTtPBv1qey53qRCROrXaGNu03jURqVibM3gu7RUnyt6_LnPGMxDIxydYNA0ssMsuRpEz8vE1MdGXDrV.yHL5XTBraQgBPMGTcq9B.uI2uONh9O4qZXJ17qawzDeKFvyWythGRvykifdn369TS8AU31_hKK7NC74lCLJ8DcSiW8oCOT_jisQuMWsBVeMFXwzFS4qp3WUSlUsct6.OoQ8tpsYj2ykCpHiSoaMjwL7t_XWVXt7dlJYUPdSML1yDmO.unKtTDGpMzgiEWRM1fT74GZx3Obc4PedR0VycRZYK9O1xKiVnBctXsftSMAbsPaA7e0ocHHuwr1Ef27XI3bX0WKog0aK4UgzxieuymMBcCL2hvg0uf.ppyWnjeh68KVIgUvTgnf5vVIkGjeqmXFp_bgvH4J1HOrm8t.Aw.hq9eph44Iwn7jpsHtw3iXSMhUAjjdAddbOE6Y7vYfXG813t_QC2BcGVkNjtfFKTsQuyzzyXhsJ0ebvJmbUv8Ct.wQ3MiPuiajZ9vrBz7JADcnhaJASnL7_sDqoCQbvKaE58C66qjL.felcbXKFgLGkdiQBBP_NLEmRjlloVYI_VsXDACuCa8XJuetly03McF1KZAk2MxGlLcVCssryUYZbJ6lUlkr_rUOzOAp98jFnkJ2PI',mdrd: 's607CS5nGRKFRjTGlGcbBA2V.pHl8TxVyXLViSSD.MI-1768264758-1.2.1.1-f1idrw9CmMimZ_aLya2GfukHoJxM1CppgoQ7KwYkg4_7.KEaOD1XM5AS9fTXDSI5QPrsh0f55eQxU6VejpGWzbOdjkhHZF0GUihlKSBpflJTFZ06XIATDJcR0wQRXTZ8F2AbJHgNN_N4SvruVGdCeBhJ.gyGRwWDUuJrojTQzbODW_VGe1mmZ0HrZ76tFY1RR4G4cR90PxTOfp3CZA5yEt6rALYxSXv6Xk_z4CBMt9eq2GzSkRTjSj5CMSbBA1W5oER3m8vLBEcZWuJjUGaAoB8dsIrZoaL_133xh5b34ZbbVXDx3tvjQSNQe8B6rR2LDLXaRhvFgBMxf_p6sXGVbq2QmBCxiQn3IQQCOnTilHKGwZ2njcXh816ALoXsXe9cMmqKct7hlBjhH5ZL
Open service 104.18.124.47:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4515
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f6fb0dd9ce-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f6fb0dd9ce</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">164.90.208.56</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLis
Open service 104.18.125.47:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4515
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70b2ee7ae-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f70b2ee7ae</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">164.90.228.79</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classLis
Open service 104.18.123.47:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8630
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70e86dbfc"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70e86dbfc-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70e86dbfc',cH: 'Z5hsjETDx8IxU.j3N4RVZJQt.NRFNZ84dJ2XhWgfLKY-1768264758-1.2.1.1-GzbbroNlsCUcAOuvzEBUhswz.VfHLpMVi0UUsCwxJluM8pn0MVWqftuT6BTwAVpo',cUPMDTk:"\/?__cf_chl_tk=GA_yTnKJOdQfWFzUzwHRkDpp1BcFZpAJjgKxYuCT4rs-1768264758-1.0.1.1-2B3wGwFXV0HUS8NdSrKgP_ZhOf6CWS1dj0B1xAr5ruk",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=GA_yTnKJOdQfWFzUzwHRkDpp1BcFZpAJjgKxYuCT4rs-1768264758-1.0.1.1-2B3wGwFXV0HUS8NdSrKgP_ZhOf6CWS1dj0B1xAr5ruk",md: '5qFjBiLBHB4aeci1PLxH5vJ3uJQEZTvf1C507rlgYj8-1768264758-1.2.1.1-JN83gqjov8R27Ib6xl_LWbommZw7EGXQF2qWyi_xIgdMba_rPI6B.NmrhXVM5b1eTcwK.BNm2.c9aVQVcfYuRN3EaX98ZdKL38ipIUC0vC5KF6dKeOo58eQQfdAUYGfcYADMhwSuH.omlR9AfgdEbVueaVCDpCcWSL.W62GDtflYTw4sOS8mMLYJjUmiBek75HSG7OV8lTScCIUGgIZ2oXuZXjsla6UKiXYGlpl8c.NH3lDsnQ7I8fowkK9GBk55C26WYpYuRqoz9JVzMbRmSZCCnGZYTAovJ78QRdTJm4MigE7enE7uEPi0H4_dLlwjWws2uz7PesFeNSlQqT4Q9n0yi5udbbGr64QTxiObKyXqOI0cryUsLNevJxugb76n7ueU7QYa6pEfGxUnSFC1AAtmJLLTXezdmSUKJQkWPAVgwr0tTikskFKRnwB.4KU6Sw0w78WhFdHT0_fUUN0qT6WfAOi_1ZNmOkE8eUy96_6sMfbpbwhl2REAJqfAlwh6J48.2luVG0.woBuSNa0UswtmazOkLuLSIkHoPUywDSHu0nAlqJJ6NXVvsxciJBGHHhdg4rOTWfdjxZhcithdjd5rrPk5KAlNSEBtcqArDwT2NNtijJ1Wpyc2h7.QGP_9sSdIvq0Za8yHwdR9tjAj45xahz2q0bnHscl4wTBQciUY37GhBRuXLAxI5DFjfPdxxX8fguCgPr7.9_Y1X7rlYdMJ687rpF93scZU3rwOzn1E4elDsRS0_JLcZ3MnlrxGDheLFxkPpbtnBw4IJoyrIxN6w7NajrpkjWAXYP0ubWrC60GremC4TA5lNWtT8S0OpMi1x90Wh4mL6F2fbZMdhOFpN.YBXfVu3wAIENF18Qoyng2cJ22lF9TVdYsp5xcUe6ryvudfWVWGJxVtgCmvlRdLkvxtUDcUdGHo2z_haYIFF.BNEErp1hIaG_tRUcLEq.10x4t.DU9GKw5zVb8yAbPQ3Ptl5FP4j8T3AsqS.pg',mdrd: 'K0WNG6pGQZWPy1ZlufyH8ljlzED5ERMFiAt9K06404g-1768264758-1.2.1.1-nLfoY6gDpDklkemjb_c8l77QVT1CqIPqyFybd11KiLOkyGnDdKK528IL41E4tWfw1dQmQFfHKCEx1hYTE8vc7nt9PfIFOu.QXNCPo5dBHyFFZu5ikrQChFXAeDWu.OKlWtcEz0W5INZ6WqVC8wRBrwcJ.BqNsYyXF28wpLPLCqBe0rcjh04gP9jr6aNwD0IEtbaQFbzzAZMJbotrwISJFlKHQtRoLSQFHeD90JVJotq2sIi5jafl9GbpK6b8WverIMtCMAoMv96eP9Yzb8Tbl3atWHTrI8tRbndIAkx9tO1aCoIqkPlAcu.YB7qSYPt66wN8tIYH8tmzvbq5AdaswswzBkMQLdNNKrYS3ln1.x.RW2kk89YU0bTQ6sGBWphSe6mDNP7Nt1BxNJuv
Open service 2606:4700::6812:7e2f:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5345
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70b06dcc9"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70b06dcc9-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70b06dcc9',cH: 'HVsDtWkHgGD4khJf.twYd0V.xVlx7KFrzGplAJX2Odw-1768264758-1.2.1.1-zBqsOFqBBX7wmpSOXYmI0vKSWAZkQs1ADXImU2X2vf11IKKfXCfs7ZDAuJBH8oIt',cUPMDTk:"\/?__cf_chl_tk=w84V1jKlEfE8gCvOkC.1d6vMnOFpkG5kALDPW80bX3I-1768264758-1.0.1.1-VxIhc7vyt5VzzN8gQ7A8OXuoQzNz3u1fbYcnoBv6aLE",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=w84V1jKlEfE8gCvOkC.1d6vMnOFpkG5kALDPW80bX3I-1768264758-1.0.1.1-VxIhc7vyt5VzzN8gQ7A8OXuoQzNz3u1fbYcnoBv6aLE",md: 'HzThR7AXnIS1exNoylxxtv7GO8MfUsnr0KR4YGnLGmc-1768264758-1.2.1.1-6jZIdXkR4aFt0.cGUNFwagdI6tWeYh0WGIZtiejfS7e_IxueFNyH7y1NMuFM77oQ1PWrTX6Lh4MmSP_3Tf7rEs9CuF7UfPciYS3VD2XRkRNaOb18wBlL3i.42xlRULe2jjeftP_Jjate.ZXyDwHVVAj5piQ_gR18jhmDqaVL8bWb5qVXOleQ4ydJOQNQy.U7yNJDwQRDue3t2_FEQLCdVsmDLNdheX5A6RU3TAkP8JQ1_kwSQuuekPkGvfNFsKQcNwz2dpI0aW96AtVAk.BW6lh.BSphZb8c102MRgfjwLx9XUcBUDXjpP5Vo2_5Yc0PZwu1joGPZ3eXXJkgEq8IVA5977DMAEDL1zMMqWlAvA_A4ax5z1lSwY7418CovZP39M7dZDXD2TuLyZN4BRxWg4Xh85nxBcRTpCnXgzmSB_idAQpxB.h3Ph47oq6u6olejtyOI_jDtFgtrwYrVCqeYzTkjaXu.AXbSstoJ.U1KFf7CtPuUN49wpXOXtljtUxy9fZjT4GuQeVgz4Ra2kbkUY7KjO8.hhINTJEw3dh6S7liOSd.r0zGaEdnDyVlMDPOJMXgXAq7MpQ0L2gHwE33qa0aH6_OjmAejQyyvSrNEF8n3bxxIxqo.IL2Pvfhl2FLetoJAZGHGoxBBwZP_rkAHd8Qsb6ofR1uBkERL6K_vR12MSSBmC.1zLL1PY.p7ylAs3G77lsI5j7eyMDOHChHxhz_W.QHbU3sD9gU4Q.yDBbc.RFOj66oiY1dHhLoG1H7YPrV2ZSXvVgot3RTHea3F3rPOJVLULmEPTFLJ9_QPb0XupT..dbcmcu0B9YuTaQmvXTP61PGfzjkqcUBkkJVppyt24IGamTfGOyc_f8jrP0a7UDfvE8lIZVrfp2DOlYC3Y23VG_uXRjjkPfHD.0s0spEp_EnjNUjpLvIbYXQ.fGLivrgiJn4OP8c5Xk0XfP1UsLr_lssjB03NEVJInBjUfbzzCGQLP4e8qvQPkDAc0r5oR2YbRpHWJ1Bj9gpohQvFdPu18j2Euj1pyMKMpVN_w',mdrd: 'Kinz7OGBQSXmuNiL5YxXquye_mVgcNB2J7qlMMQPQ0E-1768264758-1.2.1.1-.zFeTpQ_r5Qy7QPuExAONDzKgj5PcDS3l_ebjm38H2VVFlAz9MLQOI8DnZpsZPyyjcAL4qgUr0NolveekVYediN1vCRkYz3KfXUOZomC5mjhBmUVgdIIStzh2tFanQBksdcabMXsJ7PG8dmBqk2DKZ3fKQ3NsQuTYpQyVBWfORIdUGk5Vt3JQmX.mT15ibmvl1OWRJGq6BbeAVFI6dyvvJGa9M06fY3SWkLWGz4sY11t9uhvCxtZgj9SRyQ6Vkpf.NgD_L6mBFGqMdBijO7CntRsLWc78fBDWTle9fXK4ga3KHVEnJrPMTXzcy1p..nTOIesHwRbEGTiRXQCNFBtmnfIrGL8nvQxTCJaD
Open service 104.18.122.47:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4514
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70ad8d2f2-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f70ad8d2f2</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">138.68.86.32</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classList
Open service 104.18.125.47:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f708efdcd1"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f708efdcd1-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f708efdcd1',cH: '81KuqT.NUR9uoazb3gAPpBOXEmol5A_Gzp8HrRam7wI-1768264758-1.2.1.1-yfVeBAWJpOhig_e4BDFpedkh9Hk8fLWtAZCdBFXqLyqwIkfOoPSVJXR2WHn4JsUU',cUPMDTk:"\/?__cf_chl_tk=B1RgAYzpWTv3Payw_OZo_QConLBeJGHzq49mIQAdc0w-1768264758-1.0.1.1-Jk_qu16GBJVP5XgRlAbmN76.1sd4bs671TYVwbPbcTc",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=B1RgAYzpWTv3Payw_OZo_QConLBeJGHzq49mIQAdc0w-1768264758-1.0.1.1-Jk_qu16GBJVP5XgRlAbmN76.1sd4bs671TYVwbPbcTc",md: 'LLsRqkNQAOuRe75GFWtUXL0UOgo7dl8J4lnEecPvAqk-1768264758-1.2.1.1-U1wGBnoBlDLt2u..6UAx8zz3rVsS1akXObzPjWJMk7DixWpR3.l2PTBzSSfC.4q_FQ5b5ptguHxsSQx8DXSKHpuYlwiSW1ggniDUEoqFdtUVtBStEq9gAaKz0gR3gk2TXO1YctdmgGpamnlIQb9QP6dYbqns0_sHC93dEvAOvdo3HsiLkQ6Ul1RUrOI.H8UeBU_g7si9F1up8Tj3ekhgha3i.Ou4b_HIHrvXN35JXFyt3y7N0in5PvQtuh2wr9tw_sVpL82F5M39L5Hlrf5nc6K3IGHCMu.saNX33j9L1GXUuUPu1JOBiGakG7C0Kmvxa4H5n.9xklp6ICeiSUM0I9WOLKyCsJrVIP_J4Ug1k6rmUg6uSFZzRh_RsAh2NMB7vcWx46u3jINn7SCw5rFGowYMUwfos7lwLdCQy9N2j85CdFsrCpQyLch1bJLyaApGfufQwN9vWgkVloEKJBQCB6XC5Nk7ki1q8YG24G.Gz4pc8UeVZIyMyjtmS9lRNEHlCAM8ekH4DY7pdeMRflK8eljc6e0qx3HWUSZO1j5_baQysMntRLX7C1sMEdNRn_8NJLccuKiNJov6x4sq6aVQE9i8DsItP0fhoOgH3S_KGYa7T_CBgmOD9P8AiONJTlT57q3b01B3rodSIfGSb5qtltcYWMCBZ5g1tJVk5XUudz5RuRWP8GD0rNwOcmizIFAIwiiU9YDVaJSoHxOt0RvpRPbzjutD_6uvtDeLvgL8pFS0aQ2aXJpEWpaFFwcl0EC5YTgCTi_fvP3RzAvN3TwOjkq.ACGMbp2DM4eRgSXZqwJ_OqpH0E1hQ4rWSAdFBbsKwI5m_XoOwGEMsNucYuMR57XonyZxKmX9mtcpU.HCAVre5cm47Yl62ceZTbcD7RXbcA72w8j5ZQZSsi8ruS8bP5GBq0moyo97Elm0qcyvkUC3TgXTPBgGmP0Wfp.BH7bhBGDAqEyEwV0SiODBW0GOcGq_L5NbS_QfTqfCMVZw6MY',mdrd: 'Jqkf.MnystLdnIh7y7a2xZfHCeUTcur_1KJ7MP5t.nw-1768264758-1.2.1.1-L7MvHTiNpIHpizuwACcEh8foQH7GK2jwXBHaS_f_ZDMi0H9XFMgG2M2O.8uFi5tOSiL1.m5zcKnJ8OSD5dYuuTM6RCDMqROLP9FyOfypuWHSwlqsyjZw1TvTtbEj_gBmoXkd1fAO9EXpoc5DCeITBc7Pr6JlsHtKHgHMJeMiGSapO5cijftmdUQMkf0UOmy5hIKuuzyydHD_M1sCuowkGhHLA9wLUSZkBywb_t4YD3ysuAq9c88EoQ2olT6GhW4QV3fIDCUgy8j5L2awCH3E9j3RHmiCRSmvtcvI3f_LovQN4yMkNv1LsSJxIw6rn2vQUshsQ47HZ2yR0ChOHMiJYf8b1z0HWQ5ST9Js9HUQoq.PVF8c15dRHccooIYa5UcqZdz6axJ22xghqbI2
Open service 104.18.126.47:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4514
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f718c1bbf2-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f718c1bbf2</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">138.68.82.23</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classList
Open service 2606:4700::6812:7c2f:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4526
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70ad3dca4-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f70ad3dca4</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2a03:b0c0:3:d0::d09:a001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&
Open service 104.18.125.47:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8630
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70ec78ffe"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70ec78ffe-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70ec78ffe',cH: 'f1nMVZmOEa5TmINZx_bBx5yHOY7FHN_IPAv1wLjwK88-1768264758-1.2.1.1-CcAwj6I7AtLYzKkwIutwKcCWQejziotU2R3F.AMf3ErRiqpZok_6CD396tRlh2AN',cUPMDTk:"\/?__cf_chl_tk=0OfeUP8jMfWR2aanzO.BXWm31EfaOuhn.yjlgDxa4mM-1768264758-1.0.1.1-DhXv0Ak27QYA3PovL_XuwCM8D3ILgu_8XmhBULYPpyI",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=0OfeUP8jMfWR2aanzO.BXWm31EfaOuhn.yjlgDxa4mM-1768264758-1.0.1.1-DhXv0Ak27QYA3PovL_XuwCM8D3ILgu_8XmhBULYPpyI",md: 'CNI2dHtMXlvgmn0zrJlGJb8Ko.08SYaNm02r2nFgpMg-1768264758-1.2.1.1-IyAKsYpC5AL.3MV.gGoaUTeonthIQxnbteKpgCfIGXsGd7nxOITkwc0Z_zSYYjhgVczzkAiAzEZgfeTQq.QvjC4xagPwFkn2op8_r7ALLyPdiaIt7muN8i06KeNnDUZY9wVUHcjfZoNcjPpLXfiYwLqznm2dflBPMMc6Opb_QBzqn7RDB4XXVNsynR0nN6vX8yjEoFzN4Uoj8WRCS1uYHByxv2JTmQQ9xq_Don9OTVCeUJZh7eMFb2G_UIb0mOWXi0qvMgtrmBqh6YxsS88L0cvGDmsTXKQwov9078r8E7EqfZnaoqQEvCqCuPc96KK3MNAQKVeR4mWn2YyPY2e0GLPZEkNTVp_hIwAgXETS5eiwAkWK77Gn7HnnjR1wHOEEFix7vdNwuaCJk3ch7hSTzDPo1oXkWBJ9QjapbhcFWYfWZ0myRTNg3.vww4A4tr6d3dS1jWH5ibKPbdKDuAo8UaJYJ39XsnZRt_OyVVLtvYwbkAXkxaNzc.DgGDD8sgQu7pYkFqJESelRKeKgXu.dsnzIB2NhXhHbYUWhb8L1KqptCX542EfsIdr06fhsTPhCx.89SofWYtbbO14rw1MD3VwvkrVRgfAmUUMSkyKBzYluYYD3W7TL._P_0CNYTZ4fY1ww2Pzplds2JE95nqa9lIzsX1bL6GoFx.LREYdgz.ybk0RPRMBumBCCi.3TEqNUxvkV8WGaE67TBFuqBCiHnM63diB_2aJrTU2zj2z93iyNSnV84LRXmt7o4HdFYWxWcPT4IPzoemhs3P_kqDxdZU8p5Pcx.mNY5sL5glWwdOcAH4RX59_.FeUlxgaWZvDtBm4b5kQ29iCx7cEpvwJiLT6TVMkzC.qp7rYIwo09fxbojX1Ro5liq6fin1V8kOnS3Pn8fCsaJMkYg3r9mNbTwacM1JTi7octpFkrhJUP1ILH5RIwfCzPll9fuNrUbXe32E13a6Zkm6v2G6ExOMy05J3OUWRJ3kb_ZE.i5sRoIcE',mdrd: 'kzlYvHxz23MhOm7OifPyhecKYsgMERBXC5Onxkq7_4A-1768264758-1.2.1.1-7_0XRq7l5CECM3XAjOD_FfQpANEcUw0Jb1Kc9eB6NL0RJ.JMqjrO7dNgDij4tjIFYX1kCsfERPwM1YzzKXZLcCduFSjJX_P8AeUN5gu34ebU5oIOXkYJRrX.Xyi9M3ftoiIOqKOR5HZi9VVr4X8int8UXnR3PRjUpALPGs0d63xLgUKOz68xfejUFjl8Osm_1xEh7cgtEUED2_CNC9G6E8PJCRF0jUPuRxZ2SWYe6kD00QgzpfnDok3q2qY0ULrLe0Xyr7LAQXMMknvvtocs4fMBSlmwS7KhywtlMas6sGMgkg2dIdGfA2YW65x2_ZqGEBtIS95zUEJ8LhuuVdOJT3bd8bGqwYIoHkxcRKXrvE00HG4XkG7F849ont_81OXJ7IPb6yRx2vs04AJF
Open service 104.18.126.47:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f70fcb3a6a"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70fcb3a6a-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f70fcb3a6a',cH: 'AEseXEsePKwj4ILgaqwHUcEZ8W9iNZs7JdPp5i95sHU-1768264758-1.2.1.1-xreKh_ZGR2tAXw44G.32v8vhYIgVQQvRXcw1ldlLrY7VlUFZkbc01Zao3BN7XREl',cUPMDTk:"\/?__cf_chl_tk=RV7sRAARA8X4RNpWLUK2fATcF9SD7ymkdIr5.wKSgpo-1768264758-1.0.1.1-NQIoxVE5i4Ih.EHNH36RNa09KHXlGCuJG3oqZzPD5J4",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=RV7sRAARA8X4RNpWLUK2fATcF9SD7ymkdIr5.wKSgpo-1768264758-1.0.1.1-NQIoxVE5i4Ih.EHNH36RNa09KHXlGCuJG3oqZzPD5J4",md: '6AMMiueYD4FTVaE3S9_g6tuXk4Cesp6q1xO6FvzShhU-1768264758-1.2.1.1-PS7uY1MZSlS3HWhi7.y8RkXeuHtFzDRrBOsYUqA0Ae5v43hntagLqx3adOtLQeQAa8TFRnFbqteOceZAB6Q.aT74Indfes_TGT.vq3KUuvZMd5ItJD5GR5eomkq7q18x_Q1ZBkLxtm_ihnePc9iuDKDW2pMKHTvwEB036bJ2pJ0t1L._LW549JLvFituCTsyuoLZvS93Llzylyoo5Wg6iN8QOzK0TvFEQSVJiQih511pwL8Fnu0BqZtPyxE2p36kQvXiAbqWzlMlYj3IgojLacMqL0fxIhhFluj8kECF55PY3ywNrddqFW3k7H3mEWeRhjL.GH9z8ingkSkplzAkwXQwWLTkm13CC8JSXIBDv4zND7kC.SUtVbPdLfd1teEubCf4MeqGDonNxe6v5Cg..FpwSXH4qou16rgJpCWnKSsmO_BHCUhLXda.1Af4.npWk7dL8RaBX_yyMLZZzBB9EpVTQ0ME0C5g5qW727boRtBBfA2YoUNxzOjCATY3g98ASy1Oh4iYFPZC8JSpFdyB2hCNFcw54P6YWFUei9nKfZk0PrKzJfl6epWFsEMZ1dyHV_wZRl9nvRTJmyIMn.ctuFJHum06_f3G3UgwXcLPBwIOyynzilRp5yZA7E1Br1WV0FHuW49C5hwFVTzxFvmdxcY20pn23uQyl3FXRh9MTSTbB7oBnab1xitRfT1aE5q_QihDdX1C2mNukFrgLHHp5mIJQVXpYwC7M_EgppbpeaadW9FfWrEEvHnxwnlx1_Rd1OeOtsIzg_pWskKhiBNICXBNL0Z_zq7uUFOPPaXT10XvrUxhAaZwjI_Bf7.vryyIFURKce9awJzTNvplWEb.tNWig6xccA89Fzsx3lM1yNe7Ny2VJeHF.DIk4LKFco2l5Uw1zkTS.YhIAjdp_fUTGlGwOZEBBQyrU4BJFuZIxT14wyFqJZGtsClvPMhOacMU2Dfc54uy_5.9JA5_ev_riBgpKpaO4lrNQcb3MxCo1Zw',mdrd: 'MVbxZRMfo.ZckEyY50OBBs041Sx6cwhe9N8pSURMB8M-1768264758-1.2.1.1-uPQPmF9UkXm3MUqrAp09jh4k.tWwsYbc.Dq2jrjhiUTbWxLlEf4B0zk6tKdFo2v.pyyMWWOZLIruygmaTrRY7GAOEoB_yr3JwVTM1Q.Vg.AqTipS0mA3aGekeGFXby5cJFoTtjywCb0bsRJxIO2qeOSilt0jFkLY8gIRAQlVZsaK.hWBvXkweJWW2ry0xCcpt.dL32pS7FVWcx_vj7.R.ilL9PI0LMcNt8XCy6okpPGcjkuBbQltbYgrfaXibghnSAjmOjlH50wRoJYFkHK8x2vQ.Is5VhQGII15Gb37774y.nOZFF9HbdrD69pQXt48yhVDAs5SpoHsQ9kb4fyyZJqdYlpuGIqNppN0jnaT9lzRkFsbCheBGx56kJi_6ohlVEGM5lpviiEOCQJx
Open service 104.18.124.47:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8630
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f6fcd0dc6e"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f6fcd0dc6e-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f6fcd0dc6e',cH: 'i56jYrUwOUnioxnCG9_pnj7OSuSodOWykD6MpXZIwuc-1768264758-1.2.1.1-nvH.n9MIWsxdFUpnaoxftfMCDXs0f.EtLRl5zESRG2iHmjinaP33YsJPZzMdKhIX',cUPMDTk:"\/?__cf_chl_tk=zHkB3KsdytHAvCnvnUnBR7ShfGFuR.lpu_.Ycm5q4Po-1768264758-1.0.1.1-Y7UM8_YqH3mq8KhoI3iaLWpwRLE07Orn.xchd51.TrE",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=zHkB3KsdytHAvCnvnUnBR7ShfGFuR.lpu_.Ycm5q4Po-1768264758-1.0.1.1-Y7UM8_YqH3mq8KhoI3iaLWpwRLE07Orn.xchd51.TrE",md: 'wKmZsqVTfD1qcg61uhY3OovDo6L23nPGgDlwO0poxI0-1768264758-1.2.1.1-_iNKL84R6ZrElqFDy0ZbSh.kY4vKEknj89PaoFQlMOzjK4C5KVQYWVw8XeuGCqnQbpRGEXWA7CI5_gE_EYkgxSBvai653mWw6eWQs0XqPHY09vWAjDk97Td_hjEZ_FiLcZiLSvcoOGjQK_A1jKj8c9DOPyoeeIBPx4lrJ9Ap4nzzOuUOzLUI_RZG_Y6_u7hAVmhZuDgLSsi6BoNuRWn7prb90wFAQwA6dwv8ArR9Z4N3UXYsPk5l3NaU_EusjgpHhwEBTV9kP0Fcz02jSMgQ.5EoHkKEND09398l0QQA7ZgnPwnCeUb7c.3GrYPpYUldghMaz2moVfjomctiDNNcFJyc52yuZz7EjwzkSDpwRuhgxew2LefP.vlBM2Z0kETksk5UwvPcMCwQOCjyEJqNeiPsQuEd4z2efrVKTyp_W5aAmAHIC19fPy97_t6ArVomUJV8DGN4VLWhUYneB.xNeQDYox1CtmLtg5VR038tQdzT03IcX0KxUSk0JOvlsuviyf2DlD_Cv1sDlHEawriZok7j_JOPFCxf9oD5JTrkDpI3h1.0y89dveGIM7.u4.v920bHmgX6.bS90Kt_NIDck4dR19hK7e8xg_9IkMM7aFBk2rJt.izcxmeEQ0pL_GNOJOAvqRLMerBa6Zs9bPUXHsrXx1jyEShIy7l9z9wnYas1qb8kllSIHOCdYq.0E2AILg9Cb0ixuzsdMCqpl5eZgdbkaEgCB749q2xyXuyi2VCjeqJ5ew5Kez8IiKT72Oyv6o95XVEtRW7Td7z4xSmhbMOugdibUohIDDimDBPSwcfNOKxVLA0zCQxPCsZgM.vl3Z4R0MiK5TtHasbQRFx1Sz3HG3E8oi.L4yVJX_pvX.nOSNVqZTpnjaTzbV7XkazmU2.U9msLL6AGklzt96M701zFwFOUdURS3xTkCGrvbF_aMAUkFF_OWf0DivLtU8.vsTzVE3QMa.Uid205I3Yo8E7pJ_RY3P9Hwk5plk5GPjg',mdrd: 'tl_Qjv3LQA4mT5uZyjbxCHFQOfvN5zOyQRqW_qQye4I-1768264758-1.2.1.1-05x_Wn_0Jzdcgp1T6yM44ADXbUk2stqyQ5WnjaYwfWH6_2_HPbCDo8p5slQmSxfhEOssd2MxOjRy4LCaSfj7yBZ5.Scgv.lDmZ1rtkzzuqEXy3..xCkX7bu0eIbv0lh9.5kDzYZ1jOTk8zyMpUHauxGHiJznDfHQsCJFOzRnWdAPzZE19EdFUFJZ4EbSuYfvjLXdwH5b9NWrb4MIjz96H8OHO9umAsRsZa1KXY_21RbK8iaYFKFYdyoyPeOgJAvCJALpwxrd6Xv9RQ1qkTbnwknTaeDlKx_LoalW_KyxGCueWJr8guxsxFiVQbswEFZXzKuAK3l.MgEO79YboYXds.QhZgXZ1hvr.EiyOV8bQ.gzDkZHqKB1USAKlWNw3cKyoWS6qhTQbF3sSB6n
Open service 2606:4700::6812:7d2f:8443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4527
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f70d1d9d31-AMS
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bd0d5f70d1d9d31</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">2a03:b0c0:2:d0::1773:1001</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&
Open service 104.18.122.47:443 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8630
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f42d7d8560"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f42d7d8560-LHR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f42d7d8560',cH: 'g4LjtjWteQTNJF5N0D5aPu2R2cZpBsqWUzBp1gwkMlY-1768264758-1.2.1.1-3wAmdeXh8nhoCLVPbWszmyE3Jv.nW9voLGIBPxnHMLtg.dqkbyr6KBlvcAEqfIAm',cUPMDTk:"\/?__cf_chl_tk=D7J24HD2BR_nr6Or9un70S0gM5Nx2rskzf6_9pZSKk4-1768264758-1.0.1.1-AAMIY04RjsaAKSi1_Y5MZOL.e4SPhhCJjFi4thuEZFo",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=D7J24HD2BR_nr6Or9un70S0gM5Nx2rskzf6_9pZSKk4-1768264758-1.0.1.1-AAMIY04RjsaAKSi1_Y5MZOL.e4SPhhCJjFi4thuEZFo",md: 'wWdvA0kXYcGWTJPhX1PMxxa666gq0Fj.DoYJFmDq80A-1768264758-1.2.1.1-kBjibZjaHrOZNXWYZZgf28ZIWQo_1ndxyIsztFbE.k0CXplVDsn13L6_MDoWXLS5V3lWt1_CqNaPylesq2IAf7ogmlO_UWavhdXoo40c6HrkZIKohNdcS7JsttaNifp3IEBBazhMSqTzuB80AnbR42OW6_OL5T1LCie87Lnn8XWoDgAcq6lzYPLac5WtHCBb028HmU1qvQnWQem2ommONRgyC0yAZ5lblms9Rt7RrvUdDRKu_LWaJH79BIDRWOs5mJRsnrsfMRvncDjQFMq_PO0T6uTrrhayI.tbTWTRsSpofn1AX4rnHHI8AJpDTQjaB4Zrljtk66vtrifGzJ9cyshAv73fE1MoBaFG58qikNoBkU0BmvIT53F3s_zgZNm3NO6z00H0_Gh.eZ8u6PI68Tf5N.bEXT55CZbamFFopOGzUPpcYd8RKOpXcA3YE1.HeirfmYZK.gETBKj7GkBjZwFsrcCj2EnBIMLjWebwkwEIlGa4_4j1Ppp_wbDPFIplf2F7nxkv4hh1WbH0E1S.I_lAYtpFfiE.b5YdrQb7pEnxjUadluZKuVVHpi3lQ4YBBVZ_hjO7Gp171VjHv5YgcTxzsXBN4g.PWO_FsZN2q1cLtXZ0s3ZlUvVV0imwnr3PBjL9OytvxBlAyX0oV2xhz4v_J1tjfM5PAs4p7g3ef3RSv72MMULG2B997gv2_YHuBR3GhCnsGejI3azBv3DtobBPkNE7ataLK1QHaSx5LMAtDIfTTnKQ0IrUeS3zghPqPI1Qs6bHsYEi9_gsN4F4LRyGSKX5IYrYWgvrUwk98IoqO.30PQd33FNlGsy3KFg0r55RDRW8r41iWaousmiUTcgHy5er_CSic1lC18Z6nrTdAP.iDGszBuiBLwhjJCq1K6km3crXx7.BDxmrxw38y5fNVcWh1OpxTwzujRFOiLyGaxDtuZr81ierHUFrzelmfSTE2pnyzFMErk1FEsK2olmwXUv._mifRBcHpGI8VSc',mdrd: '4mOEDTf.VHEl_BsFCtMcEQgfUUbIQnELYgaUVUvTt6s-1768264758-1.2.1.1-AdWOQhF19lS6UaNs9LbN_pDPc0Ai7QzY.5NYWNRuPXB3wGCxaZgRI9tZ6TrOuUA3grMUlasRvUPQj9Dg11dHYiEXWVA8rLp6SyEM80A_J05WNHCOtT7rcLiL98WPJJS6y.8zZfwCvZ.7HmNz_Hrdt2td3P6vBPizkLqrpYUEO4l9ocWOrjw3hyi7ALBZ4JA.U2HAQj7mCSZ1unlPIvw3J6NbztWENsGnYKcZTnPjxD1S.A3XF82hNQCucBFPGgAjsI9K4pWcOGW5z81u2euf7wpk.F4lzuIlwI0vfte9M2Bqzxxze6Z4LUfbXqFU0ThU2o24t57LSvC38W5HpXN9aVBOtoA67tvsQbrO8sUaO6c7UIuNpopeDvPk.0IOg6Tklg0OuKp9xmKeO786
Open service 104.18.122.47:80 · mit10.alumclass.mit.edu
2026-01-13 00:39
HTTP/1.1 403 Forbidden
Date: Tue, 13 Jan 2026 00:39:18 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bd0d5f3ed89b407"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bd0d5f3ed89b407-YYZ
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bd0d5f3ed89b407',cH: 'npXpmv4Dm3xlvIcbKs1nsfk7aqxFYJJtxmio6kUd26Q-1768264758-1.2.1.1-hupQEONPSDc4upgpU_8AguhlTxXGyn6LK2BX4mJCirlhNNz46H6LZi6I4JS8vLLf',cUPMDTk:"\/?__cf_chl_tk=PGJ4iVyAJGYYqBWeFLPUPKaElRiJQsYKNvTJ6S6fe94-1768264758-1.0.1.1-kS5GtCwy4GxIr6cf4tp9lkIDFKOmT4dlVGZft31Uou4",cFPWv: 'g',cITimeS: '1768264758',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=PGJ4iVyAJGYYqBWeFLPUPKaElRiJQsYKNvTJ6S6fe94-1768264758-1.0.1.1-kS5GtCwy4GxIr6cf4tp9lkIDFKOmT4dlVGZft31Uou4",md: 'X_FapSSFylUO.w1bGOUzcp6tR5_Ola3NAOBamLVKkQs-1768264758-1.2.1.1-r89IAVptO4wDdv9RG3AMvSO.lCYiCmgbcQCfd0nk_tpFg7NdnLNib9bEBg56IAub2UYX_u6ViT2mf37GyzSOGRcvzmtyuA0mIUc8cP5LQA.66cj.a.9IjIqd9TD.IpjKv2Q5gqHCgu9_ld0rPwZ0RP86NIDw6VdXH1KbtC4UXVSKNFs1n450Kq3u6oT987uHssdpR60bZWx2LdfnJIbKwahJQDzXap6a8kfA0oUKn7TtnF4U7uI1aNcZb0drNYwv2J3xfOHsM5xj3zVi7nC8YacFVj.wqc2MSL9aQpD9Hnt.plcQXGJG782kd9Y2a_UTHXjvf1n.36lS_HaYcvQtAuT22OxAq_VqjhhzCAvWbEE3TJVE3D3Xja.b4SNFLbXYeksPlgVv4MrsOh8tgaxIpQqLwmFFh1txGBa224rhtGa06atFUHWVHICqOEzJX.vJHsqhbzc7oYyil2ElCu26sT4tL.6G61dZIf1dNIhEMwCOGyogCz.oFFUNHaXv15lEsVowy9fsb2NTOdt2EBq9bwLbhwwVKJ471M1Rxzesr0T3PxzSpz5Q2dQ875T9FSL5WlJX5qRDs0EXx0KGPgcN0j03QXnPSmvBlrazNW5De371oLqhd8cd5RIWS6.IYh5lLFXYvMA7RxnxMEneDCmd5ekDySj.NjyqTG30dRf3F0zz.GayynRuuvt4voR0pMP6oWJ5yqHWqTSKV7UsLM5N0hBp99RsGKoaXP7H5ExYk7Up1svrtBDYgildGjXgaC5cIaBHTFkkERgOWC2LmLjLJL24NNDlzzAJ.B3TPLu.NkHZEMdJSRcXC52NEizVqAGUvUFwViLy3bqAEE0eBrQJTsotRcl035qeicrvFQNWrTGCLiz5zLc1HrnChGj6Ab.BTBuR3SC8.77lrsOPN3pWzgIHlJiWfYC4UPOGfngJEONlfOIBJ0IbrxpjOQdCUG4glJjTLxfLUDoyItB2V7MGgjSqyGNYNKPYCfbjwMdvVjs',mdrd: 'LsDToS6qjtIDNAK6_xcv_cc6XfzRtV3rvRAh0TB9zSo-1768264758-1.2.1.1-jhgq2dbZXS2EnRfXPjkfv91Wx0phEBlRDY7ZFaVbIVRy2RTHYl1e3NdFhu5WrbkI0U_YvjBMLj9LXy9QX8b3Thg8J_XxBdimdvLP5eYBdUob9LSKyRwW8TpeyTvh8hSr9fVGfl5rYJwSsyd6vXFRIg9oqRsWkC61YZuf55rE8FHqGHIpSoVCmniXnmhOaH_wZaSI6tEIAY.7CWXjn4t4XuCQ0ZAYyk05KOK2IUmX7Y7gKE2HQhX1j.D1vbiLvSFFTNnofXelaBQ3yeJ5zMC2oI9ZZ.vlyCn2Bfl92gBKJq9XU80mwFBLFfgKYkz4pTJBd2qwefM_d7kyH_8p9CE9M51JqUmcudg7mHDd0rA8uL00CHTt2pAGz_WI.cTtvxEAkQQgQl6I6wY1IGxO
Open service 104.18.123.47:443 · mit10.alumclass.mit.edu
2026-01-10 11:25
HTTP/1.1 403 Forbidden
Date: Sat, 10 Jan 2026 11:25:32 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 8652
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bbbd073beeb1b58"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bbbd073beeb1b58-EWR
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bbbd073beeb1b58',cH: 'sxmq0NdhfmotPtyr3IOoQmuYxOfuG65cmw_L5Z520mQ-1768044332-1.2.1.1-hUdY__7WxqF5GqwFdVEZKPaEBTf7eI3I4PzSR2YDNiIySfO_PxPaZuBQaWvZk6ql',cUPMDTk:"\/?__cf_chl_tk=4GQLtdVIaXUW7CNMXN_Zyl9prvhBjfovU0YZ1hVMxYs-1768044332-1.0.1.1-tcE0w410zrPuKQVdZsY5tWj9Ls.WwwHEwgjgIO5xDf8",cFPWv: 'g',cITimeS: '1768044332',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=4GQLtdVIaXUW7CNMXN_Zyl9prvhBjfovU0YZ1hVMxYs-1768044332-1.0.1.1-tcE0w410zrPuKQVdZsY5tWj9Ls.WwwHEwgjgIO5xDf8",md: 'vSlhes.Z0pRmemgDnq0y4Jjz3LAWAvTEz3RB_LKhnrE-1768044332-1.2.1.1-GluY0iIFrOfozZSzV6OcQTV1FkLrw.OVT3GjliBy.bJdJcDwgLbWFpg0nkfwTEKEay6hxCdBWBXWTrjDq12Cg2gJrAxdoIFmIQWRUaxM._nQ5kPWJsWDpixP9SYh1YJYFxF28Tja.sgpfLyOxiCmBNKadBvkeKC8Ma0uj1Q1rU8Fwo8XjWm5f6lSMa9UpGIcQyVyagwXjHgm3agcPI1Mzdpbx4Th9bO6uZIY94Zk2hrVLKKemgMPamDdPY2OZNtQfJVFdzATzaMCaPOSR9nEatvq3R.oMJJuyvb4dFDnke5nFbui4xadNzu4ETws8I6.2f4Ft.7rQyp_5SXeTYsovaCK0CmIiXAQJubMlHqa62Qfc81hBMpMj6nF3wjgx15uuD3a7H5bei301emrI6boIofdmw1s.E0S8VRx8crLEHu0Gq3JwIcl3BGgrtOYDoUAOd8FlsGExqiBVwnuAWEAJPD6QjDArruwTI2LM_MTU3Ccduft9z5uWGX5gv36z4tkDi8eXet8.EAYSZ..HhsB63b01nEOA0BmjUM6r08f3n2S.AOMAabzb.nmxfTDO7GNKCH8m5IxyMUbwd_ZO1kv7gRIO7ZbjLrlbpSFj8fEDCcOCiVsGyvPGX87_SismN0KCsfYemZvIWtGmXDbaxS.8FHOS3qZAEV4scuje9gsgrLeujP88w73DTv1I1ySmUH.s4HWUtoZavJ8PVzDKlXmPafDRlcSA4JYLerV_7r0PgAlfWxn0hmB4txlM443FSRGph3G5ED1Ja1NoIww4Jl4lTBAB4LdbEkjIakFEvpPxVo9p.e0e0tqG5lA3uIrUA6_qH02u4oVclyuY27Y9KCXc73DnMIOJfehtBmuHzNjrGVO1483NJhG.bXlz9TSrEJ61CRALB.jgK8BMzfT4iX_Pv7Ow3sl3HqqMOWPmh8tS30M0NHS38TgwC2fNmkiYwdvDdyAF0CLA5tI5TYynNu8hEOL4hWECVDrML2NOSg3_j0',mdrd: 'S3aEf.1wXtOgXP67MJjgP2.uBaxeU557.j3og7snrfU-1768044332-1.2.1.1-oTBbX7F7e_JUVhZZjR0utD8KIzXHngQj5b3LaUualCb6bTc7oeESntQ21SlCDasQFcORvFuASXtLw4x8aFhJUtqXzc99u3.3Wd_5AW7EdHmtVyb5S8No0lt6c3T93qXmqypkqwGmlJtKQcxMC0CDKAfPhW9.AXgLuaK7UL3rqdP_JLd4yelnZ9OC0xr96xyEeOGdSsaqjV9Gm4cnMKdQzZKf74F_A1JnycTIVAhgyxopzxROyocTw.gcAtXAo.DoT0H.8q7QBzsfvEioiN02oKZp9xO0dug4I2DFvM1yXC4qC7FW0Tdyi6QYrIbxbyApx8LNmscnLNR_zM.88NnrPjBVKQ65_7RFjukZN3rHidgApxjWi4YwM74.0tAjvUwmsJb2ttn2QPBNTedm
Open service 104.18.123.47:8443 · mit10.alumclass.mit.edu
2026-01-10 10:54
HTTP/1.1 403 Forbidden
Date: Sat, 10 Jan 2026 10:54:39 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 4517
Connection: close
X-Frame-Options: SAMEORIGIN
Referrer-Policy: same-origin
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bbba339ea3b9273-FRA
Page title: Attention Required! | Cloudflare
<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en-US"> <![endif]-->
<!--[if IE 7]> <html class="no-js ie7 oldie" lang="en-US"> <![endif]-->
<!--[if IE 8]> <html class="no-js ie8 oldie" lang="en-US"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en-US"> <!--<![endif]-->
<head>
<title>Attention Required! | Cloudflare</title>
<meta charset="UTF-8" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
<meta name="robots" content="noindex, nofollow" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<link rel="stylesheet" id="cf_styles-css" href="/cdn-cgi/styles/cf.errors.css" />
<!--[if lt IE 9]><link rel="stylesheet" id='cf_styles-ie-css' href="/cdn-cgi/styles/cf.errors.ie.css" /><![endif]-->
<style>body{margin:0;padding:0}</style>
<!--[if gte IE 10]><!-->
<script>
if (!navigator.cookieEnabled) {
window.addEventListener('DOMContentLoaded', function () {
var cookieEl = document.getElementById('cookie-alert');
cookieEl.style.display = 'block';
})
}
</script>
<!--<![endif]-->
</head>
<body>
<div id="cf-wrapper">
<div class="cf-alert cf-alert-error cf-cookie-error" id="cookie-alert" data-translate="enable_cookies">Please enable cookies.</div>
<div id="cf-error-details" class="cf-error-details-wrapper">
<div class="cf-wrapper cf-header cf-error-overview">
<h1 data-translate="block_headline">Sorry, you have been blocked</h1>
<h2 class="cf-subheadline"><span data-translate="unable_to_access">You are unable to access</span> imodules.com</h2>
</div><!-- /.header -->
<div class="cf-section cf-highlight">
<div class="cf-wrapper">
<div class="cf-screenshot-container cf-screenshot-full">
<span class="cf-no-screenshot error"></span>
</div>
</div>
</div><!-- /.captcha-container -->
<div class="cf-section cf-wrapper">
<div class="cf-columns two">
<div class="cf-column">
<h2 data-translate="blocked_why_headline">Why have I been blocked?</h2>
<p data-translate="blocked_why_detail">This website is using a security service to protect itself from online attacks. The action you just performed triggered the security solution. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data.</p>
</div>
<div class="cf-column">
<h2 data-translate="blocked_resolve_headline">What can I do to resolve this?</h2>
<p data-translate="blocked_resolve_detail">You can email the site owner to let them know you were blocked. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page.</p>
</div>
</div>
</div><!-- /.section -->
<div class="cf-error-footer cf-wrapper w-240 lg:w-full py-10 sm:py-4 sm:px-8 mx-auto text-center sm:text-left border-solid border-0 border-t border-gray-300">
<p class="text-13">
<span class="cf-footer-item sm:block sm:mb-1">Cloudflare Ray ID: <strong class="font-semibold">9bbba339ea3b9273</strong></span>
<span class="cf-footer-separator sm:hidden">•</span>
<span id="cf-footer-item-ip" class="cf-footer-item hidden sm:block sm:mb-1">
Your IP:
<button type="button" id="cf-footer-ip-reveal" class="cf-footer-ip-reveal-btn">Click to reveal</button>
<span class="hidden" id="cf-footer-ip">178.128.207.138</span>
<span class="cf-footer-separator sm:hidden">•</span>
</span>
<span class="cf-footer-item sm:block sm:mb-1"><span>Performance & security by</span> <a rel="noopener noreferrer" href="https://www.cloudflare.com/5xx-error-landing" id="brand_link" target="_blank">Cloudflare</a></span>
</p>
<script>(function(){function d(){var b=a.getElementById("cf-footer-item-ip"),c=a.getElementById("cf-footer-ip-reveal");b&&"classList"in b&&(b.classL
Open service 104.18.124.47:80 · mit10.alumclass.mit.edu
2026-01-10 10:19
HTTP/1.1 403 Forbidden
Date: Sat, 10 Jan 2026 10:19:38 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 5281
Connection: close
accept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cf-mitigated: challenge
critical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UA
cross-origin-embedder-policy: require-corp
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
origin-agent-cluster: ?1
permissions-policy: accelerometer=(),browsing-topics=(),camera=(),clipboard-read=(),clipboard-write=(),geolocation=(),gyroscope=(),hid=(),interest-cohort=(),magnetometer=(),microphone=(),payment=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),sync-xhr=(),usb=()
referrer-policy: same-origin
server-timing: chlray;desc="9bbb6feb6c3f65d3"
x-content-type-options: nosniff
x-frame-options: SAMEORIGIN
Cache-Control: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Expires: Thu, 01 Jan 1970 00:00:01 GMT
Server: cloudflare
CF-RAY: 9bbb6feb6c3f65d3-FRA
Page title: Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#challenge-error-text{background-image:url("data:image/svg+xml;base64,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");background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme: dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="360"></head><body><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt = {cvId: '3',cZone: 'mit10.alumclass.mit.edu',cType: 'managed',cRay: '9bbb6feb6c3f65d3',cH: 'nBUozlX75Xqq7KuWt0GRmYCWNbXptCCSGTnf9AlPhU0-1768040378-1.2.1.1-OpVoTes7UFwxlxWkpZvs5j8NZWOnlGHZnl58XnARBkjiHqX8SCWr1j_pP9jsncb8',cUPMDTk:"\/?__cf_chl_tk=IowIocv6AT2d7niDT7WaSoy5s2d_KVNSpIwBX5f8SrM-1768040378-1.0.1.1-VKkAo55lSFao8n1MHVpm2eG5_Gw52eu8GNlVg4QWHjA",cFPWv: 'g',cITimeS: '1768040378',cTplC:0,cTplV:5,cTplB: '0',fa:"\/?__cf_chl_f_tk=IowIocv6AT2d7niDT7WaSoy5s2d_KVNSpIwBX5f8SrM-1768040378-1.0.1.1-VKkAo55lSFao8n1MHVpm2eG5_Gw52eu8GNlVg4QWHjA",md: 'XTPXQf_sDVmyHCa6s_EVm1ID2frQMpDefLBm8KzOAiI-1768040378-1.2.1.1-uRZ7gM1buhG8r1mmr0wCAgTvR43Bv.DcEikMP7OuIr9im9B3ss1Ei_V.ryVsSaV9MlR7Tn72ep1JW07tGyPtfX7ZLIzuwCMYU.qUZvVv80T0jlA1QbQMjFrSBs1ZPjHt.VvouGehZhbk1UYh9yP.H1CYvpJTzohrXuszKJFBpOaFGNeh0Yu0e4zSylXsOnJWAgfqhXXU5MMK10EzPu.XzvpwJD8CmhKAQOdx7mNh4MAS.SglKM07OSNB_7meUmF7ENdxKLnIUYZP_ciy0AM1NgHD1vxAbl72VC1A1L1NKMK6yPMcUfBF6ZaEHNfLXCJgNGnI1CfPL3gPWXX3yUA8w1.Ohq3a1DeGd9Ib0nqRDHWPDMkquE5k8bvbUK0G7hk9zzBZuNsEmnTYOFw1A7zHV23BPzDR8HjM0OMzfGMKnNRzZ5JjiAh6XIjMMPqHxHpeY3BtvjzaM6hDo.LZhrhlG9o_7oVw5pu2K.ozMki_PWBIHntn4JyTqtccUejyLLp0udN8hTX1TOVPtZTnMmx91c10dtbCmAnY1UX4yx_dVZsp1sHphksqS1X3swHNISlPdhQNSpA45_gUSZcvpEPT3YvY0O._dtwGd0sURLMCX18Q4k0ZByMt6G6cPFQACGr.VqFvgJujkh.Iujz3gUaHq3AtQ.xZLlugqG6lnhr_YPw1jGE.idArxgogX6AA6Nuc6HXLCRBqUDDTTCeickwwN.6ijDGQIjQ9gzVh2cE5LA8ZBdgsG_uZ8jQ2zMPTxn6UARvD8nJitNPd588qP440y7Axq1sHPE0lKhsvzumzxDsFi7NK7kKnkVOiduskauA3hCmubJthnT.goaK5.70x6fZ6XxeyOJ6K4ShUcE6tlnrNOivovzObcOhdFbUw1Nb7rpFH2mRAALuL3rNf3IgLArjuFSFfzLe6wu7Xt1a3hBxox3i7NnhQP9_YVTnDcf3kgFQIkLmmeTT91wOPRJISRpgTq27muibi1upA25SsSK8',mdrd: '.txIoBSPWdcCUZmdfPvw0gV8dxmBrHAM1M5XwEXq.80-1768040378-1.2.1.1-LT8MuxN5nAbtKw24D8KlDSRKYSwzwHcHqV.ffMyebyCoGcsvER4fZ9ClleUBsHJ8vG3the8svk227wJ3b_96ZI_enYmWHz2VGctk0vhQRVVAp4UBRVD69iALSVYmgFXUXr5FQegEAnTKSCEakKbXfa85h9CXg8v5EEniN5n1QzjlskHOz3koOCZqznOSIYUKCYM17LW9EDmeKSAJ7UxEIqYWgKRk7JDyBavif1RW9G0GfKcId5eN7xbpEIQmnqtFPePj76UslGAmIakpnD0re7ghwNv6VS5EzbX_3T_PGrBcPs4NYJpnRgSdCHQImF9PGmdiIrJgknv6WLXrPsFls9HXCOyubwxBpIgAmHETnmlUeL.hQivuZn98QXJg7DhWwdDnWrPf8fwTn8PZ