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Mike Chirico (firstname.lastname@example.org) or (email@example.com) Copyright (c) 2005 (GNU Free Documentation License) Last Updated: Sun Jan 27 09:40:26 EST 2008 http://souptonuts.sourceforge.net/sshtips.htm If the system administrator deliberately filters out all traffic except port 22 (ssh), to a single server, it is very likely that you can still gain access other computers behind the firewall. This article shows how remote Linux and Windows users can gain access to firewalled samba, mail, and http servers. In essence, it shows how openSSH and PuTTY can be used as a VPN solution for your home or workplace, without monkeying with the firewall. This article is NOT suggesting you close port 22. These step are only possible given valid accounts on all servers.
This document covers the SSH client on the Linux Operating System and other OSes that use OpenSSH. If you use Windows , please read the document SSH Tutorial for Windows If you use Mac OS X or other Unix based system, you should already have OpenSSH installed and can use this document as a reference. This article is one of the top tutorials covering SSH on the Internet. It was originally written back in 1999 and was completely revised in 2006 to include new and more accurate information. As of October, 2008, it has been read by over 473,600 people and consistently appears at the top of Google's search results for SSH Tutorial and Linux SSH. What Is SSH?