#!/bin/sh # First check if this server is actually an OpenVPN client if [ -f /etc/openvpn/client.crt ]; then # Now the magic line # This first checks whether there is a route, and if there isn't it will: # 1. Get the local machine's VPN IP (up to and including awk) # 2. Add a new route to 192.168.0.0/16 via that IP addres (from xargs on) # 3. Print "Fixed VPN" and exit with code 2 to indicate that it changed # Note: I've been told that the grep and awk can be in one command, and I believe that, but I find this clearer. (ip route show | grep '192.168.0.0/16') || ((ip route show | grep '192.168.0.' | awk '{print $1}' | xargs ip route add 192.168.0.0/16 via) && echo "Fixed VPN"); fi