# VirtualBox Bridging

# load the tun module
modprobe tun

# Create a tap device with permission for the user running vbox
tunctl -t tap0 -u {user}
chmod 666 /dev/net/tun

# Bring up ethX and tapX in promiscuous mode
ifconfig eth0 0.0.0.0 promisc
ifconfig tap0 0.0.0.0 promisc

# Create a new bridge and add the interfaces to the bridge.
brctl addbr br0
brctl addif br0 eth0
brctl addif br0 tap0

# Give the bridge a dhcp address.
dhclient br0