I need to access a VPN. But to be able to start the VPN I need a network connection. How to know when NetworkManager has already created your connection? By refering to here, you can add scripts into the /etc/NetworkManager/dispatcher.d to be run by network manager everytime an interface go up or down. #!/bin/bash
if [ "$STATUS" = "up" ]; then /etc/rc.d/openvpn start else /etc/rc.d/openvpn stop fi
So that openvpn will start straight away whenever any interface (IF) has the status up.