[root@~]# vi /etc/sysconfig/iptables :PREROUTING ACCEPT [0:0]

## Internal network for port forwarding
-A PREROUTING -s 192.168.0.0/255.255.255.0 -d 203.198.153.123 -p tcp -m tcp -m multiport --dports 20,21,25,80,110,143,10000,60000:60100 -j DNAT --to-destination 192.168.0.10

## Public networt for port forwarding
-A PREROUTING -d 203.198.153.123 -p tcp -m tcp -m multiport --dports 20,21,25,80,110,143,10000,60000:60100 -j DNAT --to-destination 192.168.0.10

[root@~]# /etc/init.d/iptables restart

## Portforward for preroute & postroute
iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 16811 -j DNAT --to 192.168.68.11:80
iptables -t nat -A POSTROUTING -o eth1 -s 192.168.68.11 -j MASQUERADE

## Firewall allow
iptables -A FORWARD -p tcp -d 192.168.68.11 --dport 80 -j ACCEPT

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