auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
adress 192.168.2.1
netmask 255.255.255.0
up iptables -A POSTROUTING -t nat -s 192.168.2.0/24 -d ! 192.168.2.0/24 -j MASQUERADE
up echo 1 > /proc/sys/net/ipv4/ip_forward

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp

auto wlan0
iface wlan0 inet dhcp