display X apps on remote X server 1

[nix45]

I'm having a problem displaying X apps on a remote host. I've done this plenty of times before but for some reason I can't get it today, I must be forgetting something. On the remote host, I ran "xhost +" to allow everyone access to the X server over the network. On the host I want to run the X apps from, I ran "export DISPLAY=remotehostname:0.0". When I try to start an X client, I get an error about not being able to open the display. Neither server has iptables running.

root@remotehost:~> xhost +
access control disabled, clients can connect from any host

root@tux root# export DISPLAY=192.168.1.61:0.0
root@tux root# xeyes
Error: Can't open display: 192.168.1.61:0.0


Thanks,
Chris

 

[unixfreak]

Hi,
new distributions have a -tcpnolisten (or similar) flag set where the X server is started up (in the Xservers file). You need to remove this flag if it is set.

Cheers

 

[nix45]

Ok, it was set and I removed it but still no good and also X doesn't start with the computer anymore. Its still in runlevel 5, but I have to start it manually with 'startx' after logging in. No big deal, I can fix that with some investigation later on though. I edited the /etc/X11/xdm/Xservers and / etc/opt/kde3/share/config/kdm/Xservers files on a SuSE 9.1 box.

I used to do this all the time on SuSE 9.0, RHL9, and Fedora Core 1. I also tried on a FC1 box last week but it didn't work. I'll find one and try removing the -nolisten option on it later on.

Chris

 

[gangully]

I had the same problem in Fedora Core 1
Try System Settings; Login Screen;Security;
and untick : Always disallow TCP connections to X server.

And restart X.

This appears to cure it !

 

[nix45]

I tried your solution and it worked, thanks.
I gave you a star for figuring it out, but I'm actually not going to use it though. I found that forwarding X apps over ssh is much easier and is much more secure.

I'm curious as to what unchecking that box actually does though? What files does it modify?

Chris

 

[nix45]

fyi, you can forward apps over ssh simply by typing "ssh -x root@host". Thats all you have to do, doesn't get any easier than that!

another fyi, if your on a WinBlows workstation and want to do this, in PuTTY, you can select SSH - Tunnels - Enable X11 forwarding before you ssh to the server. Then download/install cygwin and open a bash shell on your WinBlows machine. Type in 'X' to start an X server. Now when you open X apps from Linux, it will be forwarded to the X server on your Windows machine.

Chris

 

[Arren]

Hi, there,

I have the similar problem that "cannot connect to X server". And I have tried all the solutions suggected here, I could not find "Always disallow TCP connections to X server" under the System Settings; Login Screen;Security. How can I find it or what else I can try?

Thank you in advance!

Arren

 

[nix45]

Forget that, just tunnel it over ssh, its much easier and more secure.