1 iptables -t nat -A PREROUTING -i ppp0 -p tcp -m tcp --dport 22 -j DNAT --to-destination 10.0.0.1
2 iptables -t nat -A PREROUTING -i ppp0 -p tcp -m tcp --dport 443 -j DNAT --to-destination 10.0.0.2 --to-destination 10.0.0.3
3 iptables -t nat -A PREROUTING -i ppp0 -p tcp -m tcp --dport 8080 -j DNAT --to-destination 192.168.1.1 --random