Ubuntu
network-manager-pptp package

  1. Bug #151112
  2. Comment #7

Comment 7 for bug 151112

Revision history for this message
Michel Dagenais (michel-dagenais) wrote :

Several people have reported the problem here (Ecole Polytechnique) when connecting to a pptp VPN with either Ubuntu Feisty or Hardy. We probably have a big bad router which messes the MTU negotiation and the MTU must be set explicitly to a value below 1400. Setting the MTU in /etc/ppp/options or through a script in /etc/network/if-up.d does not work either; presumably network manager comes afterwards and forces arbitrarily the MTU to 1412. Thus, each time the VPN connection is established, entering afterwards in a console the following command fixes the problem as suggested by Ironphil.

sudo ifconfig ppp0 mtu 1300

Fortunately, the source package for network-manager in Intrepid alpha (8.10 alpha) appears to be fixed.