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How can I connect to common-lisp.net through a restrictive firewall via ssh?

April 26, 2017Connect firewall restrictive SSH

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How can I connect to common-lisp.net through a restrictive firewall via ssh?

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Some firewall administrators are paranoid enough to disallow outgoing connections to the ssh port, but they often allow connections to e.g. the https port. For these cases, we have SSH running on non-standard ports on shell.common-lisp.net. The https port is the most common one that is left open, but sometimes others are open, too. So ssh on shell.common-lisp.net accepts connections to ports 22 (ssh), 23 (telnet), 80 (www) and 443 (https).