Mailinglist Archive: opensuse (933 mails)

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Re: [opensuse] openSUSE 10.3, ssh and X11 forwarding
  • From: Marco Calistri <marco.calistri@xxxxxxxxxxxx>
  • Date: Wed, 09 Jun 2010 11:31:31 -0300
  • Message-id: <4C0FA5C3.2020607@xxxxxxxxxxxx>
Roger Oberholtzer ha scritto:
On Wed, 2010-06-09 at 14:14 +0200, Roger Oberholtzer wrote:
On Wed, 2010-06-09 at 12:48 +0200, Johannes Mueller-Lahn wrote:
Hello,

I had that case on SLES11. I installed "xorg-x11-xauth" via yast,
afterwards I
could do a ssh -X -l root <remote> and then Display forwarding worked for
me. I
dont know how this behaves on 10.3.

There is no xorg-x11-xauth package on the 10.3. Too bad. Perhaps there
is still some missing package. I so did not expect this. Timing for this
could not be worse...

I have now verified that a working source computer (the machine I ssh
from) fails against the host I want to run an X app from. When the ssh
connection is made, the two machines must, it seems, agree on something
before the ssh-from machine will set up the X port. It seems that is
failing.

So, perhaps there is something mussing on the system I ssh into that
makes this not work. It is a rather scaled-down system. ssh is of course
installed. Is there anything else that needs to be installed on the ssh
destination for X forwarding to work?







Best regards,

Johannes Müller-Lahn

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Roger Oberholtzer <roger@xxxxxx> hat am 9. Juni 2010 um 12:36 geschrieben:

I am trying to run a remote X application on a 10.3 system. There is a
problem connecting to the display from the system I ssh into. I do this
all the time, and usually there is no problem. But I have a system that
is not working and I do not know why. Perhaps I have forgotten a step in
10.3.

I have edited /etc/ssh/ssh_config on the system I ssh from, setting:

Host *
ForwardAgent yes
ForwardX11 yes
ForwardX11Trusted yes


There is nothing in ~/.ssh/ that overrides this.

When I connect to another system with ssh, I would expect the DISPLAY
variable to be something like localhost:11.0 But that is not the case.
In addition, I would expect to see a port listener on the system I
connect from, in this case on port 6011. There is no such thing.

I also tried the older method of setting DISPLAY on the remote system to
refer to the system I want the app to display on. This does not work
either. I ran xhost + on that system. Once again, I would expect to see
a port listener on port 6000 that can be connected to from other than
localhost. I do not see this.

Could there be something on the system I am ssh-ing to that keeps the
DISPLAY variable from being set?

I am in a real bind as I did not expect this problem and need to run the
app urgently! Any suggestions are appreciated!


--
Roger Oberholtzer

OPQ Systems / Ramböll RST

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

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--
Roger Oberholtzer

OPQ Systems / Ramböll RST

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696


Roger,

Beside checking the pkgs and related dependencies, I will also check
network settings (Firewall) if it is the case.

Furthermore, give a look at this page, may be it could be useful to
solve your problem:

http://www.ssh.com/support/documentation/online/ssh/adminguide/32/X11_Forwarding.html

GL,


--
Marco Calistri <amdturion>
A false hypothesis is better than none at all. The fact that it is
false does not matter so much. However, if it takes root, if it is
generally assumed, if it becomes a kind of credo admitting no doubt or
scrutiny--that is the real evil, one which has endured through the
centuries.
-- Goethe

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