Linux iptable static NAT
modprobe iptable_nat echo 1 > /proc/sys/net/ipv4/ip_forward # Please make a note # eth0 -- internet interface # eth1 -- private interface # PREROUTING statements for 1:1 NAT # (Connections originating from the Internet) iptables -t nat -A PREROUTING -d PUBLIC_IP -i eth0 -j DNAT --to-destination PRIVATE_IP # POSTROUTING statements for 1:1 NAT # (Connections originating from the home network servers) iptables -t nat -A POSTROUTING -s PRIVATE_IP -o eth0 -j SNAT --to-source PUBLIC_IP # POSTROUTING statements for Many:1 NAT # (Connections originating from the entire home network) iptables -t nat -A POSTROUTING -s PRIVATE_SUBNET/24 -j SNAT -o eth0 --to-source ETH0_IP # Allow forwarding to each of the servers configured for 1:1 NAT # (For connections originating from the Internet. Notice how you # use the real IP addresses here) iptables -A FORWARD -p tcp -i eth0 -o eth1 -d PIP -m multiport --dports 80,443,22 \ -m state --state NEW -j ACCEPT # Allow forwarding for all New and Esta