Listing 3. Upstart Configuration File for iptables_custom # iptables_custom description "iptables_custom" author "Mick Bauer " start on (starting network-interface or starting network-manager or starting networking) stop on runlevel [!023456] console output pre-start exec /etc/init.d/iptables_custom start post-stop exec /etc/init.d/iptables_custom stop