I'm using "FWBUILDER 2.0.3" and I'd like to know if it is possible to do rules as the following:
# Tag Incoming IPSec Traffic. 'mark' sticks after processing.
iptables -t mangle -A PREROUTING -i $EXTERNAL_INTERFACE -p esp -j MARK --set-mark 1
# Forward Authenticated Traffic to LAN.
iptables -A FORWARD -i $EXTERNAL_INTERFACE -m mark --mark 1 -d $LAN_ADDRESSES -j ACCEPT