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ssh - no xauth data
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ssh - no xauth data - Jul. 7, '05, 3:51:33 AM
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wizgnome
Posts: 4
Joined: Jul. 4, '05,
Status: offline
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Using openssh version 4.0p1 installed with pkg_add when I connect to a remote site with a command such as:
ssh -X mike@10.17.2.213
I get the response:
Warning: No xauth data; using fake authentication data for X11 forwarding.
and I am unable to run X applications.
However if I install openssh version 3.3 from source and connect to the same site.
apart from the message:
setsockopt IPTOS_LOWDELAY: Invalid argument
It all works without any problems, including X applications.
Is there a problem with version 4.0p1 or have I missed something?
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RE: ssh - no xauth data - Jul. 7, '05, 4:53:34 AM
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Rodney
Posts: 3728
Joined: Jul. 9, '02,
From: /Tools lab
Status: offline
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Edit the configuration file /usr/local/etc/sshd_config and add the line:
X11UseLocalHost no
You'll still get the message about "fake authentication", but you can ignore it.
(This is a separate issue from OpenSSH; it's an X11 app 'xauth' that needs some work.)
The X11-ssh tunnel should then be working fine.
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RE: ssh - no xauth data - Jul. 7, '05, 6:23:15 AM
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wizgnome
Posts: 4
Joined: Jul. 4, '05,
Status: offline
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I added the line. It did not fix anything.
when I ssh from my SFU 3.5 installation to a remote site I am still unable to froward X11 connections to my local machine with this version of ssh.
If I try and start for example, xterm, I get:
localhost: unknown host. (temporary failure)
X connection to localhost:11.0 broken (explicit kill or server shutdown).
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RE: ssh - no xauth data - Jul. 7, '05, 11:44:42 AM
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Rodney
Posts: 3728
Joined: Jul. 9, '02,
From: /Tools lab
Status: offline
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Check the setting of your DISPLAY environment variable then on the ssh
client side. Check it has the hostname.
I'd assumed before you were coming to an Interix sshd.
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RE: ssh - no xauth data - Jul. 8, '05, 3:20:31 AM
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wizgnome
Posts: 4
Joined: Jul. 4, '05,
Status: offline
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Local System:
/home/wilsonmic: env|grep DISPLAY
DISPLAY=localhost:0.0
Remote system:
Warning: No xauth data; using fake authentication data for X11 forwarding.
[tibco@theserver tibco]$ env
HOSTNAME=theserver
TERM=xterm
SHELL=/bin/bash
SSH_CLIENT=10.17.2.130 4373 22
SSH_TTY=/dev/pts/4
DISPLAY=localhost:11.0
.
.
.
.
However with ssh 3.3 downloaded and compiled from http://www.networksimplicity.com/interix/openssh-3.3p1-final.tar.gz
I get on the remote system:
/home/wilsonmic: ssh -X tibco@10.17.2.213
tibco@10.17.2.213's password:
setsockopt IPTOS_LOWDELAY: Invalid argument
[tibco@theserver tibco]$ env
HOSTNAME=theserver
TERM=xterm
SHELL=/bin/bash
SSH_CLIENT=10.17.2.130 4386 22
SSH_TTY=/dev/pts/4
DISPLAY=localhost:11.0
In both cases the same settings. But with one version X forwarding works, with the other it dosn't!
I can work around the problem by using the ssh client from version 3.3 rather than the distributed version. I have also tried this on an Interix installation on another machine to a diferent linux server and also to a solaris server all with the sam observations.
Mike
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RE: ssh - no xauth data - Jul. 8, '05, 11:11:24 AM
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Rodney
Posts: 3728
Joined: Jul. 9, '02,
From: /Tools lab
Status: offline
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It works for me going from Interix 3.5 with ssh to sshd with
the env var DISPLAY as "localhost:0.0" and "machine:0.0". I know others are using
X11/ssh successfully.
Something else must be causing some interference.
If you change the environment variable DISPLAY from "localhost:0.0" to "machine:0.0"
where "machine" is the actual hostname does it then work or not?.
What do you have for settings in you /etc/resolv.conf file ?
When you change the /usr/local/etc/sshd_config file did you restart sshd?
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RE: ssh - no xauth data - Jul. 8, '05, 11:33:06 AM
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Rodney
Posts: 3728
Joined: Jul. 9, '02,
From: /Tools lab
Status: offline
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> When you change the /usr/local/etc/sshd_config file did you restart sshd?
By this I was implying "can you ssh -X localhost and it work ?
I've tried ssh'ing out to a couple of other systems (BSD, Linux) and I
can display back a xterm without any changes to the default install.
So there must be something local to your machine which is what I'm trying to
figure out by my questions.
I missed asking before: which Windows OS & SP are you running? Is a firewall running?
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RE: ssh - no xauth data - Jul. 9, '05, 7:45:52 AM
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wizgnome
Posts: 4
Joined: Jul. 4, '05,
Status: offline
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Changed DISPLAY - this made no difference to version 4.0p1 - version 3.3 still worked.
resolv.conf:
# This file was automatically generated on Fri Jun 10 14:56:50 WEDT 2005
#
search
nameserver 194.109.6.66
nameserver 10.17.63.65
lookup file bind
Yes, I did restart sshd.
I can ssh -X to localhost, but it works (not) as before!
Windows XP SP2 - I turned off the firewall as it was on, but no diference.
This happens on two seperate installations, on two different network with different remote machines.
If I get time, I'll take a look at the code of the two versions to see if there are any differences in the way they handle X forwarding that might be relevent.
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RE: ssh - no xauth data - Aug. 22, '05, 2:47:10 PM
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Rodney
Posts: 3728
Joined: Jul. 9, '02,
From: /Tools lab
Status: offline
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xref: http://www.interopsystems.com/tools/forum/fb.aspx?m=6664
Where I think this issue gets closed (details there).
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