Linux NAT

Linux NAT

eth0 - public
eth1 - internal

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

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

/sbin/iptables -A FORWARD -i eth0 -o eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT 

/sbin/iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT