Iptables
- iptables -n -L -v -t nat -
- iptables -n -L -v -t filter -
Port mapping
echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A PREROUTING -i ethX -p tcp --dport 21 -j DNAT --to-destination WIN_IP:3389 iptables -t nat -A POSTROUTING -o ethX -j MASQUERADE