Linux下双网卡桥接

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

3. 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

4. 重启机器

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