Experimente este arquivo interfaces
:
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 173.213.192.234
netmask 255.255.255.248
gateway 173.213.192.233
dns-nameservers 8.8.8.8
auto eth1
iface eth1 inet static
address 10.0.0.106
netmask 255.255.255.0
up route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.0.0.1
up route add -net 172.16.0.0 netmask 255.240.0.0 gw 10.0.0.1
up route add -net 192.168.0.0 netmask 255.255.0.0 gw 10.0.0.1
Isso redirecionará todo o tráfego local para 10.0.0.1 e a Internet para 173.213.192.233.