ssh -X remote does not work due to problem with xauth

Lowell Gilbert freebsd-questions-local at
Wed May 9 19:47:18 UTC 2018

Matthias Apitz <guru at> writes:

> El día miércoles, mayo 09, 2018 a las 02:18:36p. m. -0000, Christian Weisgerber escribió:
>> On 2018-05-09, Matthias Apitz <guru at> wrote:
>> > When I launch 'ssh -X remote host' to get X11 forwarded to my workstation
>> > this does not work, i.e. does not produce a DISPLAY env on the remote
>> > host and says:
>> Is X11Forwarding enabled in /etc/ssh/sshd_config on the remote host?
>> > $ ssh -X apitzm at srap16dxr1
>> > Warning: untrusted X11 forwarding setup failed: xauth key data not generated
>> That's exactly the error you get if X11Forwarding is off on the
>> remote host.
> X11Forwarding is definitely enabled on the remote server. Other users in
> my company network who are coming from Ubuntu workstations to the same
> server do not face this problem.

Have you tried increasing the verbosity on the ssh session?
And if possible, on the sshd at the other end?

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