export/setenv

[root]

I am currently running 2 linux boxes now, one as a router/server, and
one as an actual user machine. I'd like to be able to export the display
from my server to my current machine because I have no monitor or
keyboard hooked into the server. I thought i knew how to do it, but
I have never done it between 2 linux/*nix machines before, I have always
used my Mac. So I'd do something like this

telnet 192.168.3.169

/bin/tcsh
#setenv DISPLAY 192.168.3.169:x
#xterm &

where x is the display number on the user machine I want to export my
video to. How do I know what number to put there, and how do I let the
user machine allow this connection from an outside machine. I think I
may have hit it before but it gave me a permissions error.

Also, this is my first e-mail from Linux, so if formatting is messed or
something, lemme know.

-Mike