# Creates a routing rule to external interface
DEFAULT_NET_INTERFACE=eth0
NETWORK_ID='10.1.0.0/24'
if [ -z ${1:-} ]
then
    external_if=${DEFAULT_NET_INTERFACE}
else
    external_if=$1
fi
$do_action -t nat $IPTABLES_ADD $IT_POSTROUTING -s "$NETWORK_ID" -o $external_if -j MASQUERADE
$do_action -t raw $IPTABLES_INSERT $IT_PREROUTING -i fwbr+ -j CT --zone 1