Virtualbox-host-guest-bridged-network-interface-and-external

http://www.virtualbox.org/wiki/Advanced_Networking_Linux

HOST MACHINE

!/bin/sh

set PATH for the case we are called via sudo or su root

PATH=/sbin:/usr/bin:/bin:/usr/bin

create a tap

tunctl -t tap1 -u ip link set up dev tap1 f

create the bridge

brctl addbr br0 brctl addif br0 tap1

set the IP address and routing

ip link set up dev br0 ip addr add 10.1.1.1/24 dev br0 ip route add 10.1.1.0/24 dev br0

VIRTUAL MACHINE ip link set up dev eth0 ip addr add 10.1.1.2/24 dev eth0 ip route add default via 10.1.1.1 dev eth0