VPN connections overwrite any MTU set on the interface

Bug #91672 reported by André Klitzing on 2007-03-12
This bug affects 4 people
Affects Status Importance Assigned to Milestone
Fix Released
network-manager-vpnc (Ubuntu)

Bug Description

Binary package hint: network-manager-vpnc

I miss an option to set the MTU for the tun0-interface. It is hardcoded in the sourcecode to 1412 but I need another MTU for my university.

I searched for it in gnome-bugzilla and found a bug for that: #344967
Is it possible to add this patches to the ubuntu-version?


stacktracer (stacktracer) wrote :

This is causing me problems as well.

yup, would be cool. I am always typing sudo ifconfig tun0 mtu 1200 now :(

Sebastian Wehrmann (sw-gocept) wrote :

I need this option, too.

You may set the MTU value in /etc/vpnc/vpnc-script line 115, but this seems to not effect the network-manager-vpnc.

Alexander Sack (asac) on 2008-09-10
Changed in network-manager-vpnc:
importance: Undecided → Low
status: New → Triaged
Changed in network-manager:
status: Unknown → Fix Released
Kai-Uwe Widany (kwidany) wrote :

A workaround is to use a networkmanager-dispatcher script. I've attached mine which seems to work.

Changed in network-manager:
importance: Unknown → Medium
Peter Silva (peter-bsqt) wrote :

confirm this problem with my ADSL network linked house.
confirm dispatcher script solves the problem.

Peter Silva (peter-bsqt) wrote :

For benefit of others googling for answers, symptoms are like so:
 vpnc establishes connection just fine. It looks like it is up. However I ssh into a server, and type ls,
and the ssh session hangs/dies there. This should say something like vpnc hangs on large transfers after connection is established.

alex77 (alex7xl) wrote :

This is causing me problems as well.


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