respaldo /etc/network/interfaces

auto lo
iface lo inet loopback


iface eth0 inet dhcp

auto eth1
iface eth1 inet dhcp

auto eth2
iface eth2 inet dhcp

auto ath0
iface ath0 inet dhcp

auto wlan0
iface wlan0 inet dhcp


auto dsl-provider
iface dsl-provider inet ppp
provider dsl-provider

#de aki en adelante deje la caga jajaja
pre-up /sbin/ifconfig eth1 up # line maintained by pppoeconf


#internet en el boteo listo :D