I'm trying to regain the ability to run X programs on my computer, from
other computers. Say for example I'm at the COC states cluster, and I
decide to ssh over to my home PC and run aim or emacs. Basically
whenever I connect to my PC over ssh and try to run an X application the
computer hangs for a bit and finally reports to me that it can't connect
to server.

I previously had no problem doing this, but now I can't run any X clients
on my computer via ssh. (Note I have no problems running X on remote
computers from my PC, I can't do it the other way around.) The only
thing I've changed that my have caused it to stop working is enabling
connection sharing. I even tried updating my ssh daemon but nothing
seems to work.

Originally posted by Lord MJ
I'm trying to regain the ability to run X programs on my computer, from
other computers. Say for example I'm at the COC states cluster, and I
decide to ssh over to my home PC and run aim or emacs. Basically
whenever I connect to my PC over ssh and try to run an X application the
computer hangs for a bit and finally reports to me that it can't connect
to server.

I previously had no problem doing this, but now I can't run any X clients
on my computer via ssh. (Note I have no problems running X on remote
computers from my PC, I can't do it the other way around.) The only
thing I've changed that my have caused it to stop working is enabling
connection sharing. I even tried updating my ssh daemon but nothing
seems to work.

Have you tried logging into your home server like this?

ssh -X home.server.com

Have you checked that X-forwarding is enabled, both in the sshd config file (on the home server), and in the client ssh configuration?

Do you run an X server on the computer you're on? (when ssh'ing home)

Is the connection from the computer you're on to the home server "direct"? (i.e. does the ip correspond directly to that server, or does it go through some kind of filtrering, firewalling or sharing device first?)