unable to export display to may suse workstation

hi @all,

i want to export the graphical display from an open enterprise server to my
local suse 9.2 workstation.

what i've done until now:
- suse wrk: xhost ip-address of the server and afterwards xhost +

- on the oes:
a) unload java
b) ENV DISPLAY={ip-address of my workstation}
c) startx

then i should see the graphical console of the oes, but nothing happens.
when i look at the logger screen there is the following message "
Can't open display on wrk-ip:0.0. X must be running and $DISPLAY must be set"

I've got ":0.0" as result of typing echo $DISPLAY at the suse prompt, so
this variable should be set.

Further investigation on that problem leeds me to enable the tcp ports for
x11. I set DISPLAYMANAGER_XSERVER_TCP_PORT_6000_OPEN to "yes".
If I execute the command "netstat -an | grep :6000" I 've got a result, so
these ports are listening.

But the problem still exists, so can anybody out there tell me where is my
mistake? Or isn't it possible to export a display from an oes to another
machine??

Thanks in advance!

sa_s@gmx.net wrote:

> hi @all,
>
> i want to export the graphical display from an open enterprise server to
> my local suse 9.2 workstation.
>
> what i've done until now:
> - suse wrk: xhost ip-address of the server and afterwards xhost +
>
> - on the oes:
> a) unload java
> b) ENV DISPLAY={ip-address of my workstation}
> c) startx
>
> then i should see the graphical console of the oes, but nothing happens.
> when i look at the logger screen there is the following message "
> Can't open display on wrk-ip:0.0. X must be running and $DISPLAY must be
> set"
>
> I've got ":0.0" as result of typing echo $DISPLAY at the suse prompt, so
> this variable should be set.
>
> Further investigation on that problem leeds me to enable the tcp ports for
> x11. I set DISPLAYMANAGER_XSERVER_TCP_PORT_6000_OPEN to "yes".
> If I execute the command "netstat -an | grep :6000" I 've got a result, so
> these ports are listening.
>
> But the problem still exists, so can anybody out there tell me where is my
> mistake? Or isn't it possible to export a display from an oes to another
> machine??
>
> Thanks in advance!

I think Novell/SUSE changed the default security to remove remote access
over X11 via the xhost $DISPLAY mechanism. I found it too much of a pain to
reenable and get working.

SO the solution is to use the Secure Shell which supports X forwarding.

From the client, assuming the server is running sshd, run the command:

ssh -X -C <username>@<oes hostname>

The X (uppercase) tells ssh to forward X
The C (uppercase) tells ssh to use compression

<username> replace with the username of the user you want to connect to the
oes box with.

<oes hostname> is as it says. Note replace the <> in above as well.

On the oes box watchout for the /etc/ssh/sshd_conf file as it has a
parameter to control whether the root user is allowed to connect or not.

When you do connect for the first time you will be asked to confirm the
public key and this will be added to local ssh "keyring".

The big advantage to all this is of course that the session is encrypted and
therefore more secure. This is the reason why Novell/SUSE make it a bit
harder to connect over the "normal" xhost system.

HTH
Jim


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