I've recently been looking into a way of detecting when OpenVPN has successfully completed a tunnel connection on the client-side (and, by omission, when it has closed same); and have a couple of simple questions.
As an outside example to get things going here, one need only detect the changing presence/absence of /var/lib/NetworkManager/dhclient-*.conf to quickly determine whether or not a basic network connection has been established on a Debian variant; a very scriptable event. FWIW, this works around the potentially buggy signaling regimen which NetworkManager has sometimes been known for...
In any event, is there a similar signaling facility which one might take recourse to in OpenVPN? Or, since I already use up and down calls to head off DNS leaks via /etc/openvpn/update-resolv-conf, is there some way of formatting those calls to add a couple of simple bash commands right from the target .ovpn script? If I understand things, it seems as though this could be a good place to start
Thanks --