X via ssh to HP-UX problem
malcolm.kay at internode.on.net
Wed Jun 23 04:43:10 PDT 2004
At work I have been using ssh for X connections between FreeBSD an linux
machines without problems.
Meanwhile X connections to a HP machine 'HP-UX hphendon B.10.20 A 9000/735'
on the network have been established using classical 'rsh' with 'xhost'
authentication because the HP-UX system did not have ssh installed.
I recently installed openssh-3.7.1p2 on the HP and as a simple terminal
connection this seems to work OK. But if I try to tunnel X through ssh
I have problems -- the connection is rejected.
From one of the FreeBSD machines (FBSD 4.9) issuing the command:
$ ssh -v -X -f hphendon xterm
yields debug information including the following lines:-
debug1: client_input_channel_open: ctype x11 rchan 2 win 65536 max 16384
debug1: client_request_x11: request from 127.0.0.1 1419
debug1: fd 4 setting TCP_NODELAY
debug1: fd 4 setting O_NONBLOCK
debug1: channel 1: new [x11]
debug1: confirm x11
debug1: X11 connection uses different authentication protocol.
X11 connection rejected because of wrong authentication.
debug1: X11 rejected 1 i0/o0
I assume "X11 connection uses different authentication protocol" is at the
core of the problem -- but what does it really mean? Is there a way around
the problem? Must I go back to the classical insecure xhost approach?
Yes, I did enable X11 in sshd_config on the HP.
X on the HP is based on "X consortium" rather than "XFree" -- can this
An X connection can be established in the other direction without problem.
I would appreciate any thoughts on this matter.
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