3 [ "$ACTION" = ifup -o "$ACTION" = ifupdate ] || exit 0
4 [ "$ACTION" = ifupdate -a -z "$IFUPDATE_ADDRESSES" -a -z "$IFUPDATE_DATA" ] && exit 0
6 /etc/init.d/firewall enabled || exit 0
8 fw3 -q network "$INTERFACE" >/dev/null || exit 0
10 logger -t firewall "Reloading firewall due to $ACTION of $INTERFACE ($DEVICE)"