# The internal interface on neta
auto eth0
iface eth0 inet static
    address 192.168.1.10
    netmask 255.255.255.0
    network 192.168.1.0
    broadcast 192.168.1.255
    post-up route add -net 192.168.0.0 netmask 255.255.0.0 gw 192.168.1.1 dev eth0
    pre-down route del -net 192.168.0.0 netmask 255.255.0.0 gw 192.168.1.1 dev eth0