Let Linux system do gateway, proxy Internet!!! __linux

Server side:

Wireless network card: 192.168.1.101 can surf the internet

Wired network card: 192.168.9.12 can't surf the internet

Set up:

1. Turn on IP forwarding
echo "1" >/proc/sys/net/ipv4/ip_forward

2. Set Iptables rules
Iptables-t nat-a Postrouting-j Masquerade

Client: Wired network card: 192.168.9.101 to set the gateway: 192.168.9.12 will be able to access the Internet. (Originally the gateway is 192.168.9.1, not the Internet)

Server stops sharing Internet access method:

1, stop forwarding: echo "0" >/proc/sys/net/ipv4/ip_forward

2. Remove NAT rule: iptables-t nat-d postrouting 1

Reference:

http://www.gaojinbo.com/linux%E4%B8%8B%E4%BD%BF%E7%94%A8iptables%E5%81%9A%E8%B7%AF%E7%94%B1%E5%99%A8nat%E4%B8% 8a%e7%bd%91.html

http://blog.csdn.net/xyyangkun/article/details/9010309