Red Hat Bugzilla – Bug 162105
REMOTE X APPLICATION FAILES ON THE LOCAL MACHINE
Last modified: 2007-11-30 17:07:18 EST
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5) Gecko/20041215 Firefox/1.0 Red Hat/1.0-12.EL4
Description of problem:
Xapps on remote systems fail to run on the local machine:
[root@rhodan ~]# xhost +
access control disabled, clients can connect from any host
[root@rhodan ~]# set|grep DIS
[root@rhodan ~]# export DISPLAY=rhodan:0.0
[root@rhodan ~]# xclock
Error: Can't open display: rhodan:0.0
I can no longer run an x application on a remote system and display it on the local machine. THIS USED WORK WITH EARLIER RED HAT OS.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
2.export DISPLAY=local machine name (e.g. rohdan)
Actual Results: Error: Can't open display: rhodan:0.0
Expected Results: xclock should have been loaded and running
I see this only with Red Hat Enterprise Linux AS release 4 (Nahant)
X11 over TCP is disabled by default in all Red Hat operating system releases
since about Red Hat Linux 7.0 and must be manually re-enabled by the
administrator or user prior to remote X11 applications working over direct
Red Hat strongly recommends using ssh with X11 forwarding instead of enabling
communication with the X server over TCP, as ssh traffic is far more secure.
By default however, X11 forwarding is disabled in openssh in RHEL4, so must
be manually enabled.
If you have an appropriate support contract with Red Hat, please
contact Red Hat global support services at http://www.redhat.com/apps/support
or via telephone at 1-888-RED-HAT1 if you require assistance reconfiguring
your system to use ssh with X11 forwarding, or to enable the X server to
listen to TCP connections.
Hope this helps.