Ubuntu
network-manager-openvpn package

  1. Bug #112248
  2. Comment #17

Comment 17 for bug 112248

Revision history for this message
Haiko von Holten (hholten) wrote :

From another bug report which is supposed to be a duplicate:

The network manger plugin for vpnc connections has the mtu (maximum transmission unit) size hard coded in its sources. If one connects to a vpnc concentrator with a mtu size lower than the one used by the plugin (1412) the concentrator rejects all packages above this (its own) size.
One can only change the mtu size via "ifconfig tun0 mtu 1234" or by recompiling the plugin with another mtu size. As it is possible to configure this value while using vpnc directly it should be possible within the plugin too.

The mtu size is coded in "network-manager-vpnc-<VERSION>/src/nm-vpnc-service-vpnc-helper.c" in line 371.

This bug affects all ubuntu versions (8.04 - 9.04). The source code passage mentioned above is not valid for 8.04.