Linux – How to configure X11 forwarding over SSH on AIX

aixlinuxsshunixx11

Here is what I've tried.

I've edited /etc/ssh/sshd_config on the remote AIX system

X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes

as well as set $DISPLAY

DISPLAY=localhost:10.0
export DISPLAY

…reboot

connect via RHEL

ssh -X me@hostname

run xclock

xclock

get the following output:

X11 connection rejected because of wrong authentication.
X connection to localhost:10.0 broken (explicit kill or server shutdown)

also xauth list doesn't print anything.

Best Answer

DISPLAY=localhost:10.0
export DISPLAY

I presume this is in your shell startup files (.bash_profile or similar)? Try removing it. ssh -X automatically sets this variable for sessions where it's forwarding X. It shouldn't be necessary for you to set this variable manually, and you may be setting it to the wrong value.

By way of background, the default TCP port for X is 6000, corresponding to "localhost:0.0". ssh -X normally starts with port 6010, which corresponds to "localhost:10.0", and works upwards until it finds a free port. If port 6010 was in use, then it might bind to 6011 and set DISPLAY to "localhost:11.0". This is why you should let ssh set DISPLAY for you.

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