port forwarding

gistfile1.sh

insert_port_forwarding() { #port, dest_ip, protocol, dest_port
        local port=$1
        local dest_ip=$2
        local protocol=$3
        local dest_port=$4
        if [ -z $dest_port ]
        then
                dest_port=$port
        fi
        iptables -t nat -A PREROUTING -p $protocol -d $LIN_WAN_IP --dport $port -j DNAT --to $dest_ip:$dest_port
        iptables -A FORWARD -p tcp -i ${WAN} --dport $dest_port -j FORWARD_ALLOW
}