- # interfaces config
- auto lo
- iface lo inet loopback
- iface eth0 inet static
- address <external ip>
- netmask 255.255.255.248
- dns-nameservers <some dns server>
- dns-search mydomain
- post-up route add default gw <default gw> dev eth0
- pre-down route del default gw <default gw> dev eth0
- # usb network
- allow-hotplug eth1
- iface eth1 inet static
- address 192.168.3.254
- netmask 255.255.255.0
- post-up route add -net 192.168.0.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1
- post-up route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1
- post-up route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1
- post-up route add -net 192.168.3.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1
- pre-down route del -net 192.168.0.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1
- pre-down route del -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1
- pre-down route del -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1
- pre-down route del -net 192.168.3.0 netmask 255.255.255.0 gw 192.168.3.1 dev eth1