drazse
n00b
Joined: 30 Aug 2005
Posts: 4
Location: Poughkeepsie, NY
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 Posted: Mon Aug 11, 2008 3:44 pm Post subject: ssh X11 forwarding - not working on some servers [SOLVED] |
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Help me please, I have X11 forwarding working to some remote servers, but on others starting any X application fails with the following error message:
| Code: | drazse@remote $ xclock
debug1: client_input_channel_open: ctype x11 rchan 3 win 65536 max 16384
debug1: client_request_x11: request from 127.0.0.1 57065
debug2: fd 7 setting O_NONBLOCK
debug3: fd 7 is O_NONBLOCK
debug1: channel 1: new [x11]
debug1: confirm x11
debug2: X11 connection uses different authentication protocol.
X11 connection rejected because of wrong authentication.
debug2: X11 rejected 1 i0/o0
debug2: channel 1: read failed |
I tried a search for the problem on the net and on this forum, but none of the tips applied or helped.
The local machine is running gentoo, the remote servers I tried are RHEL WS4, and AIX5.3, some of them are working, some not, regardless of the OS.
Here is the relevant section of the log when I start the non-working ssh session:
| Code: | drazse@local $ ssh -Y -vvv remote
...
debug1: Authentication succeeded (publickey).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Entering interactive session.
debug2: callback start
debug2: x11_get_proto: /usr/bin/xauth list :0.0 2>/dev/null
debug1: Requesting X11 forwarding with authentication spoofing.
debug2: channel 0: request x11-req confirm 0
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 0
... |
| Code: | drazse@remote $ echo $DISPLAY
localhost:11.0
drazse@remote $ ls -l .Xauthority
-rw------- 1 drazse users 0 Aug 11 15:40 .Xauthority |
For comparison, when I start with a freshly created 0 size .Xauthority file on another remote server (where X11 forwarding works) I get the following:
| Code: | drazse@remote_good $ echo $DISPLAY
localhost:51.0
drazse@remote_good $ ls -l .Xauthority
-rw------- 1 drazse staff 65 Aug 11 16:08 .Xauthority
drazse@remote_good $ xauth list
remote_good/unix:51 MIT-MAGIC-COOKIE-1 xxxxxxxxxxxxx |
From this, I suspect the problem is related to updating .Xauthority file, but previously when I had a similar problem related to missing write access I got a "Timeout locking authority file" error, which I don't get in this case. On both servers my HOME directory is on AFS, but I am getting the necessary tokens and access privileges on logon (otherwise I would get the previously mentioned "Timeout locking ..." error message).
I do not have access to the sshd_config files on any of the remote servers, but from an Ubuntu install I was able to forward X11 successfully to all of the servers, including those that did not work when I tried the same from my gentoo box.
Any ideas would be greatly appreciated.
EDIT - Deleting the ~/.ssh/rc file on the remote machine solved the problem. |
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