Bridged network

For virtual hosts it’s necessary to make a bridged network adapter. At least if you want your hosts to be on the same network as the rest of your machines.

Here’s how it’s done

# The primary network interface
auto eth0
iface eth0 inet manual
# Bridge adapter
auto br0
iface br0 inet static
  address 192.168.100.4
  netmask 255.255.255.0
  network 192.168.100.0
  broadcast 192.168.100.255
  gateway 192.168.100.254
  bridge_ports eth0
  bridge_stp off
  bridge_fd 0
  bridge_maxwait 0

The primary network adapter needs to be set to auto. allow-hotplug will not work! Also note that the address for the primary network card is actually set in the bridged network section.