Error: Can't open display

[Juan Tarrio]

Hello Friends,
I have linux (red hat) abc.xyz.com and I do telnet to some machine (hp-ux) lmn.xyz.com and I want to run xterm on this machine but I am getting error: Error: Can't open display: abc.xyz.com:0.0

On machine abc.xyz.com I did xhost +
On machine lmn.xyz.com I set DISPLAY to abc.xyz.com:0.0
But still I am getting this error. Can anybody please help me out...

Thanks in advance.

-Juan

[Roberto_30]

Which version are you using ?
Do you received other errors in /var/log/messages ?

Let me know.
Roberto

[Juan Tarrio]

Thanx.

I am using Linux 2.4.7-10

Yes, I do get messages in /var/log/messages

One more thing, I am unable to telnet to my machine from other machine i.e. could not telnet to abc.xyz.com from lmn.xyz.com

thanks again.

[Roberto_30]

Are you using tcp_wrappers o xinetd(based security)? Have you customized these services (Telnet, X)?
Roberto

[Juan Tarrio]

Roberto,
I have not customised any services.
(I am very new in Unix/Linux).
Help me out... :-(

-Juan

[Roberto_30]

Hi Juan
can you attach your /var/log/messages ?
Thanks Roberto

[Ted Ellis_2]

Juan... do you know if the firewall package was installed? We run Linux here and an associate installed every package available. The firewall wil automatically disable almost anything trying to connect to your machine. Try this (we run Red Hat as well):

enter lokkit at a command prompt

if you get the Firewall configuration menu, set the security level to disable the firewall.. assuming you don't need it.

You can also run:

rpm -qa | grep firewall

if you get something like firewall-config-0.97-2 you can use rpm to uninstall it:

rpm -e firewall-config-0.97-2

hope that helps

Ted

[Ted Ellis_2]

as part of my reply... can you telnet from your machine? If you can, then I am almost certain part of your problems (telnet) are related to the firewall package...

Ted

[Juan Tarrio]

Thanks Roberto and Ted !!

Problem was with firewal only. I desabled it and now it's working perfect.

Thanks again.

Juan