# Loopback interface; nothing complex here
auto lo
iface lo inet loopback
  address 127.0.0.1
  netmask 255.0.0.0

auto lan
iface lan inet static
  address 172.16.0.1
  netmask 255.255.255.0
  broadcast 172.16.0.255
  up ip route add blackhole 10.0.0.0/8
  up ip route add blackhole 172.16.0.0/12
  up ip route add blackhole 192.168.0.0/16

auto wan
iface wan inet static
  address 46.4.156.126
  netmask 225.255.255.240
  gateway 46.4.156.113