X forwarding issue.

JPMallory · 05-26-2015, 07:40 AM

I have a server that is refusing to forward an X session. I'm using xming on my desktop. I've tested on other servers, and I'm able to forward just fine. On the problem server, I log in:

Quote:

[me@stubbornserver1 ~]$ export DISPLAY=10.1.1.2:0.0
[me@stubbornserver1 ~]$ xlogo
Error: Can't open display: 10.1.1.2:0.0
[me@stubbornserver1 ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.6 (Santiago)
[me@stubbornserver1 ~]$ xhost +
xhost: unable to open display "10.1.1.2:0.0"

I'm unable to find a difference in settings between this server, and the servers that forward with no issue. Any suggestions?

pan64 · 05-26-2015, 07:42 AM

you need to execute xhost+ on 10.1.1.2

JPMallory · 05-26-2015, 08:01 AM

10.1.1.2 is my desktop (Windows box). I don't have xhost there.

/dev/random · 05-26-2015, 08:29 AM

Silly question, is X forwarding enabled in the client?
Is X11Forwarding set to yes in the servers /etc/ssh/sshd_config?
Is xauth installed on the server?

JPMallory · 05-26-2015, 08:49 AM

There are no silly questions.

Using xming on the client, and I'm able to forward X from other servers to this same client.

From the server

Quote:

[me@stubbornserver1 ~]$ grep X11 /etc/ssh/sshd_config
#X11Forwarding no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
# X11Forwarding no

xauth is on the server

/dev/random · 05-26-2015, 09:31 AM

Okay are you using putty to connect and you have enabled X11Forwarding in putty as well?

JPMallory · 05-26-2015, 10:17 AM

OK, so the issue is now resolved.

I've been using cygwin. I just switched to putty, and tried it, and got the error. But then I changed the display from my ip to localhost:10.0, and it works. I still don't understand why it works fine with cygwin and my client IP on the other servers, just not this one server. But since this works, I'll just use putty for this one server and not worry about it.

Thank you for your suggestions and help.