Confirming on Feisty: DHCP lease renewal overwrites /etc/resolv.conf and wipes out DNS servers set by nm-openvpn effectively killing VPN connection unless your /etc/hosts or DNS from DHCP provides name resolution for (non-default-route and non-internet) VPN network.
IMO Tom Verdaat had a good analysis on the situation: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/37239/comments/55 -- VPN connection should alter /etc/resolv.conf https://bugs.launchpad.net/bugs/37239 You received this bug notification because you are a member of Ubuntu Bugs, which is a direct subscriber. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs