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

FNB Mailing Lists <fnb.ml@xxxxxxxxxxxxx> · Mon, 22 Aug 2011 02:02:02 -0700



    Figured it out.  I was trying to set the MTU size via the iptables
    to 1200.  I had previously tried setting INTERNAL_IP4_MTU to 1412 in
    the vpnc-script as per a redhat
      bug report, but that did not fix it.  However, setting the
    value to 1200 resolves the issue.  I will now try values increasing
    between 1200 and 1400 and see where it stops failing.  Perhaps one
    of the updated packages is eating up more packet space than it used
    to.

    
    On 08/21/2011 11:55 PM, FNB Mailing Lists wrote:
    
      
      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) 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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