IPtable Forward Port

This is sample rule to forward rdp to host.  LinixGateway-->>Windows Server2003

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#echo 1 > /proc/sys/net/ipv4/ip_forward

Forward rule Listen port 3000 forward to 3389 

#/sbin/iptables -A FORWARD -i eth0 -o eth1 -p tcp --dport 3000 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
#/sbin/iptables -A PREROUTING -t nat -p tcp -i eth0 --dport 3000 -j DNAT --to-destination 172.31.255.2:3389

WWW Fileshare

#/sbin/iptables -A FORWARD -i eth0 -o eth1 -p tcp --dport 8000 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
#/sbin/iptables -A PREROUTING -t nat -p tcp -i eth0 --dport 8000 -j DNAT --to-destination 172.31.255.2:8000

#/sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE