HOW GEEK!

geek notes for advice seekers

xauth + (X11Forwarding Yes and X11UseLocalhost yes) == Still no Forwarding ?

I was searching for this fix for quite some time. I couldn’t forward X anymore using “ssh -Y” or “ssh -X” on my debian server (i have xauth installed), i was always getting this error:

~$ xterm
xterm Xt error: Can't open display:
xterm:  DISPLAY is not set

“X11UseLocalhost no” was making it working but this wasn’t the right solution..

On this bug report i found out i had the same problem and the same symptoms: i had disabled ipv6 support, and this is what broke the forwarding!

The solution is to add:

AddressFamily inet

in sshd_config! (or enable ipv6 again ;))

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