Linux双网卡设置

1. 安装 brctl工具

   sudo apt-get install bridge-utils

2. 添加桥

   # brctl addbr br0 #创建桥接 br0
   # brctl addif br0 eth0 eth0 #添加 eth0, eth1 到 br0
   # ifconfig br0 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 up
   

3. 打开ip转发

   sudo vim /etc/systcl.conf
   net.ipv4.ip_forward=1
   

   去掉该行前面的注释符#

   sudo sysctl -p /etc/sysctl.conf 
   

   文件立即生效

4. 修改配置

   vim /etc/network/interfaces

   auto lo br0
   iface lo inet loopback
   auto eth0
   iface eth0 inet manual
   auto eth1
   iface eth1 inet manual
   iface br0 inet dhcp
   bridge_ports eth0 eth1
   或者使用静态IP
   iface br0 inet static
   bridge_ports eth0 eth1
   address 192.168.1.2
   broadcast 192.168.1.255
   netmask 255.255.255.0
   gateway 192.168.1.1
   

5. 重启机器

Ref: https://wiki.debian.org/BridgeNetworkConnections