iptables nat

打开路由转发
[[email protected] ~]# echo "1" > /proc/sys/net/ipv4/ip_forward

1、一对多nat
iptables -t nat -A POSTROUTING -o eth0 -s 192.168.0.0/24 -j SNAT --to 1.1.1.1
公网IP不固定
iptables -t nat -A POSTROUTING -o eth0 -s 192.168.0.0/24 -j MASQUERADE

2、多对多nat
iptables -t nat -A POSTROUTING -o eth0 -s 192.168.0.0/24 -j SNAT --to 1.1.1.1-1.1.1.5

3、一对一nat
iptables -t nat -A PREROUTING -i eth0 -d 1.1.1.1 -j DNAT --to 192.168.0.1

4、NAPT
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j DNAT --to 192.168.0.1:80
iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j DNAT --to 192.168.0.1:443