ifconfig eth0:1 172.16.0.2
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
iptables -t nat -A PREROUTING -p tcp -m tcp -d xxx.xxx.xxx.xxx --dport 80 -j DNAT --to 172.16.0.2:8080