With a terminal window open, type this command:

ssh -l (username) panix1.panix.com

(Use your actual Panix login instead of “(username)”, of course.)This will take you to panix1, and give you a password prompt right away. Just enter your usual Panix password, and you’re in business.

NOTE: You can go to panix2, panix3, or panix5 just by replacing “panix1″ with the one you want.

http://www.panix.com/help/sw.macosx-ssh.html