X11Forwarding requirements besides -x and X11Forwarding?
I have two hosts on my local network. I can ssh -X from one to the other a
and X11Forwarding seems to work fine, setting display to localhost:10.0 as
expected. In the other DISPLAY ends up empty. Forwarding is enabled in
sshd_config on both machines. Both can run xauth with about the same output.
ssh -v -v -v -X shows the same things on both (neither mentions the DISPLAY
environment variable at all). I'm at a loss. Is there some other X or
ssh related option I've missed?