I have a linksys router model befsr41 running with firmware 1.46.2. I am
having a problem with ssh and X forwarding. When I login in to a remote
machine B with ssh, X forwarding is fine. If I then go from B to another
remote machine C, X forwarding no longer works. I get the following error
message:

X11 connection rejected because of wrong authentication.

If I bypass the linksys router and connect directly, I don't experience
any problems. Does anyone know how to fix this problem without
having to deactivate the firewall on my router?

thanks,
ashif.