====== Iptables ======

  * **iptables -n -L -v -t nat** - 
  * **iptables -n -L -v -t filter** - 

===== Port mapping =====

<code>
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
</code>
