[GTALUG] Generic SSH question.

Does anybody know of a software package or service that does for SSH the kind of thing that teamviewer does? I run into linux systems that are behind firewalls  and trying to bounce through some windows box using teamviewer or other screen sharing app is getting real old. -- Alvin Starr || land: (647)478-6285 Netvel Inc. || Cell: (416)806-0133 alvin@netvel.net ||