http://www.wiki.mohid.com/index.php?action=history&feed=atom&title=Ssh 2026-04-05T07:09:11Z Revision history for this page on the wiki MediaWiki 1.28.0 http://www.wiki.mohid.com/index.php?title=Ssh&diff=872&oldid=prev 2008-12-03T10:39:06Z

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Guillaume http://www.wiki.mohid.com/index.php?title=Ssh&diff=871&oldid=prev 2008-03-24T19:34:56Z

<p>‎<span dir="auto"><span class="autocomment">&quot;Reverse&quot; tunnelling</span></span></p> <p><b>New page</b></p><div>[[Ssh]] is the secure version of [[telnet]], where communication is encrypted. It's usual to login through ssh via port 22. But often, administrators choose another less-conventional port in order to evade attacks and malicious attempts of intrusions.<br /> <br /> ==Clients==<br /> A good choice for windows would be [http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html putty]. For linux systems, simply use ssh from the command-line.<br /> <br /> ==Usage==<br /> &gt; ssh username:pass@hostname.com -p 22<br /> <br /> ==Tunnelling==<br /> Creating a tunnel between a port in a localhost (localhost:24321) and another port in a remote host(hostname:123) is quite simple:<br /> &gt; ssh -L:24321:hostname:123 username@hostname -p 22<br /> <br /> ===Tunelling the proxy.ist.utl.pt===<br /> A good thing to do is to use the ist proxy service to get access to registered online libraries.<br /> <br /> [https://ciist.ist.utl.pt/servicos/proxy.php#autenticado Here] you get instructions.<br /> <br /> Basically, from outside the IST, you'll need to configure your proxy settings in your browser with<br /> <br /> proxy.ist.utl.pt:3128<br /> <br /> Then simply provide your fenix istxxxxxx login. <br /> <br /> If you don't own a fenix login, then you must make a tunnel to some machine at ist intranet.<br /> <br /> somemachine&gt; ssh -L:5544:proxy.ist.utl.pt:3128 user@somemachine.ist.utl.pt -p 22<br /> <br /> Then configure your browser proxy settings to:<br /> somemachine.ist.utl.pt:5544<br /> Just make sure that the 5544 port at somemachine.ist.utl.pt is open. Otherwise, find another port.<br /> <br /> ==&quot;Reverse&quot; tunnelling==<br /> Similar, but this allows for the remote computer(B:2048) to connect to the local computer (A:22) without actually passing through the local computer firewall.<br /> A&gt; ssh -R:2048:localhost:22 B<br /> To use the tunnel, connect from the B to A using:<br /> B&gt; ssh localhost -p 2048<br /> <br /> ==External Links==<br /> *[http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html Putty]<br /> *[http://rcsg-gsir.imsb-dsgi.nrc-cnrc.gc.ca/documents/basic/node214.html Imap tunnel]<br /> <br /> [[Category:Linux]]</div>

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