X11 apps don't launch on F15 over ssh/vpnc

FNB Mailing Lists fnb.ml at multideck.com
Mon Aug 22 06:55:37 UTC 2011


I have been working on this all weekend and it appears something in F15 
has broken the ability to open an X11 app over ssh/vpnc.  It works over 
ssh to another server on the local network, but it fails when attempting 
to ssh over a vpnc connection to work.  This worked fine on F14.  Just 
to double check I installed vpnc on an old F11 VM running on an F14 
host, vpn'ed to work, opened an ssh connection to a server, and was able 
to open gedit.  The failing behaviour is that the gedit window does not 
open and the verbose mode of ssh ends with the line "confirm x11" before 
terminal window becomes unresponsive.

Putting SELinux in permissive mode does not fix it.  Setting the segment 
size to 1200 (one recommendation 
<http://fixunix.com/x/19398-ssh-x11forwarding-wont-work-please-help.html>) 
does not fix it.  I installed putty and it displayed similar behaviour.  
The only difference was that hitting return repeatedly after the command 
resulted a couple of command prompts before it froze.  I don't know 
whether it is the Gnome3, a bug introduced in F15 or vpnc or some other 
package.  If someone has any additional suggestions I would be 
grateful.  Thank you.
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