Mostrar/manipular la tabla de enrutamiento ip.
$ route -n
$ route add default gw 192.168.1.50
# route add --host 192.168.0.12 eth0
# route add -host IP reject
# route del IP reject
$ route del -net 0.0.0.0 netmask 0.0.0.0 gw 192.168.1.10
$ route add -net 0.0.0.0 netmask 0.0.0.0 gw 192.168.1.1