[CentOS] xhost + via Desktop centos 6.3 not working

Wed Jun 5 15:09:20 UTC 2013
James Pearson <james-p at moving-picture.com>

Edsall, William (WJ) wrote:
> Hello list,
>  In the past we have instructed users to perform 'xhost +' from their centos desktop, then set the DISPLAY variable on a remote computer to forward their display back to the desktop. This does not seem to work on centos 6 - but it did work in centos 5. It works from a vnc session on the desktop machine, but does not work from the local desktop.
> We would typically use a display variable like this: export DISPLAY= -  The target system acts like the request is being refused:
> Error: Can't open display:
> Have there been any changes in centos 6 which make xhost + behave differently for the desktop session?
>  We've been struggling with this issue now for some time - can't find the right solution. Any help would be appreciated!

Try adding:


in the [security] section of /etc/gdm/custom.conf

Then restart X/gdm (/sbin/init 3; /sbin/init 5)

James Pearson