(editado)
ROUTE ADD 0.0.0.0 MASK 0.0.0.0 192.168.1.3 METRIC 25
de acordo com
C:\>route /?
Manipulates network routing tables.
ROUTE [-f] [-p] [-4|-6] command [destination]
[MASK netmask] [gateway] [METRIC metric] [IF interface]
…
command One of these:
PRINT Prints a route
ADD Adds a route
DELETE Deletes a route
CHANGE Modifies an existing route
destination Specifies the host.
MASK Specifies that the next parameter is the 'netmask' value.
netmask Specifies a subnet mask value for this route entry.
If not specified, it defaults to 255.255.255.255.
gateway Specifies gateway.
interface the interface number for the specified route.
METRIC specifies the metric, ie. cost for the destination.
Note que "gateway" significa um endereço IP não texto literal.
O texto acima é do Vista e sua milhagem pode variar.