[LUGSB] SSH through routers?

[cbwright]

Hello--

I'm currently running a Linux box behind a router to which I don't have
administrative access--and the only person who might doesn't have
technical expertise. (Nor do I, but, well...aphid versus amoeba, sort of
thing.) Is there a way (without IP or port forwarding; I can't enable
those) to SSH into my computer around the router, for instance by
specifying my network-internal IP in addition to the router's external
IP? Or would this be heavily implementation-specific? --I haven't found
anything in the SSH man pages or on Google for the issue.

Thank you,
Christopher Wright