DNAT, SNAT 삽입하기
iptables -I PREROUTING 1 -t nat -j DNAT -p <prot e.g. udp/tcp> -s <xxx.xxx.xxx.xxx/xx> -d <xxx.xxx.xxx.xxx/xx> --to-destination <xxx.xxx.xxx.xxx>
iptables -I POSTROUTING 1 -t nat -j SNAT -p <prot e.g. udp/tcp> -o <interface> -s <xxx.xxx.xxx.xxx/xx> -d <xxx.xxx.xxx.xxx/xx> --to-source <xxx.xxx.xxx.xxx>
DNAT 확인하기
iptables -t nat -nvL PREROUTING
SNAT 확인하기
iptables -t nat -nvL POSTROUTING