linux iptables 備忘

1. 內網機器上網

   iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j SNAT -to-source 10.0.0.1

   or

   iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -j MASQUERADE
   

   
   

2. 外部到內部映射

   端口映射
   

   iptables -t nat -A PREROUTING -d 10.0.0.1 -p tcp --dport 80 -j DNAT --to-destination 192.168.1.100:80     

   IP 1v1

   iptables -t nat -A PREROUTING -d 10.0.0.2 -j DNAT --to-destination 192.168.1.100

   iptables -t nat -A POSTROUTING -s 192.168.1.100 -j SNAT --to-source 10.0.0.2