BMENET - External Traffic Filtering

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <link rel="stylesheet" href="/etc/bmenet.css" type="text/css"> <link rel="stylesheet" href="/test/test6_p.css" type="text/css" media="print"> <link rel="stylesheet" href="/test/test6_h.css" type="text/css" media="handheld">  <title>BMENET - External Traffic Filtering</title> </head> <body> <script type="text/javascript"> function setFocus() { document.PasswordForm.UserName.focus(); } </script>  <table id="pTable" cellspacing="0"> <col width="0*">  <tr class="pHead"> <td id="pLogo" rowspan="2"> <a href="/?lang=en"><span class="bmenet">BME<span class="lblue">NET</span></span></a> </td> <td id="pMuegyetem" rowspan="2"> <a href="http://www.bme.hu/"><img width="225" height="60" src="/etc/muegyetem.png" alt="M疟egyetem logo"></a> </td> <td id="pExtlink"> <span class="smaller"> <a href="http://www.bme.hu/">BME</a>   <a href="http://www.tio.bme.hu/">IIG</a>   <a href="http://www.hszk.bme.hu/">HSZK</a>   <a href="http://www.niif.hu/">NIIF</a>   <a href="http://www.geant.org/">G脡ANT</a> </span> </td> <td id="pFill" rowspan="2"> </td> </tr> <tr class="pHead"> <td id="pIp"> <span class="smaller"><a href="http://myaddress.net.bme.hu/">HTTP client IP address</a></span> </td> </tr>  <tr> <td id="pNav"> <div id="pTools">  <div id="pLang"> <a href="/filter/external.php"><img src="/etc/hu.png" alt="magyarul" title="magyarul"></a> </div> [-]<br> <b><a href="https://net.bme.hu/login.php?lang=en&reason=2">Login</a></b> </div> <ul id="pMenu"> <li class="pMenuMain"><a href="/auth/?lang=en">User Authentication  <span style="font-size: 50%;">▼</span></a> <li class="pMenuMain"><a href="/wlan/?lang=en">Wireless LAN</a> <li class="pMenuMain"><a href="/unews/?lang=en">Usenet News</a> <li class="pMenuMain"><a href="/mirror/?lang=en">Software Mirrors</a> <li class="pMenuMain" id="pMenuActive">Traffic Filtering <li class="pMenuMain"><a href="/status/?lang=en">Status</a> <li class="pMenuMain"><a href="/contact/?lang=en">Contact Us  <span style="font-size: 50%;">▼</span></a> </ul> <div id="pNavBottomSpacer"></div> <div id="pNavBottom"> <a href="/guide.php?lang=en#copyright">© 1997-2020. BME</a> </div> </td> <td id="pContentNormal" colspan="2"> <div id="pTopsecret">This page is <a href="/guide.php?lang=en">public</a>.</div> <h1 id="cTitle">External Hosts' Network Traffic Filtering in BMENET</h1> <h2>What kind of traffic do we filter or block and why?</h2> <div class="cFloatNoticeBox">Information on <a href="index.php?lang=en">filtered BME hosts</a> is accessible from within the university's network or after logging in.</div> <p>External hosts' traffic is blocked in the university campus network if it endangers or severly disturbs the operation of the BMENET backbone or central services. Usual causes of these actions are erroneous configuration, broken software, intrusion, worm or virus infection, or user misbehaviour.</p> <h2>What are the symptoms of traffic filtering?</h2> <p>Traffic filtering is based on IP address. Our backbone routers drop all IP packets sourced by or sent to the hosts listed below on this page. This prevents the listed hosts from communicating with BMENET hosts.</p> <a name="unblock"></a> <h2>How to unblock network traffic?</h2> <p>Unblocking may be requested by the owner of the problematic host after having resolved the problem that led to traffic filtering. IP addresses blocked more than a year ago are unblocked also without request.</p> <p>Please send unblock requests to <a href="mailto:filter@eik.bme.hu">filter@eik.bme.hu</a>.</p> <a name="list"></a> <h2>Current filtering</h2> <table class="border"> <tr> <th>IP address <th>start date <th>problem</tr>   <tr> <td>27.255.77.5 <td>2019-11-25 <td>IMAP bruteforce <tr> <td>45.82.153.78 <td>2019-11-25 <td>IMAP bruteforce <tr> <td>45.82.153.135 <td>2019-11-25 <td>IMAP bruteforce <tr> <td>45.133.99.2 <td>2020-02-26 <td>IMAP bruteforce <tr> <td>94.199.200.137 <td>2019-11-28 <td>phising <tr> <td>141.98.8.141 (sour.detrove.com) <td>2020-01-28 <td>IMAP bruteforce <tr> <td>141.98.80.101 <td>2019-11-25 <td>IMAP bruteforce <tr> <td>199.34.228.53 <td>2019-03-12 <td>phishing <tr> <td>199.34.228.54 <td>2019-03-12 <td>phishing </table> </td> <td> </td> <tr><td colspan="3"> <p id="cLastmod">Last modified: 2020-04-21 11:44 CEST</p> </td> <td> </td> </tr> </table>  </body> </html>

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BMENET - External Traffic Filtering