How to reduce sid security

[tbmoore@bealenet.com (Boyd Moore)]

I have two Debian systems behind a Linksys router, with the router
blocking everything except returning packets. One system is debian
"stable" (Woody), the other "unstable" (Sid).  I have read
through just about all the PAM docs and the Debian Security Docs, but
still
haven't been able to find out how to make Sid allow Woody, for
example, start an X session as a remote host - I have tried all the
ideas that were given.

For a while, before I updated the Sid system using dselect, I at least
had ssh working both ways.  But now I can only ssh to Woody from Sid;
not the other direction. I've checked all the config files and can't
find
where it is stopping. I get the message: "ssh_exchange_identification:
Connection closed by remote host"

I would really like these two systems to trust each other with just
the "host.equiv" and .rhosts files set, even though that is unsafe on
a system exposed to the world.  But for the type work I am doing, that
is not a problem.

Thanks for any ideas.
Boyd KO4WK
Zech 4:6