define a network route if you have an entire network behind the router.
enter the network ip address, including slash notation. from policy manager:
1 select network =] routes.
the setup routes dialog box appears.
2 click add.
the add route dialog box appears, as shown in the following figure.

3 click the net option.
4 enter the network ip address.
5 in the gateway text box, enter the ip address of the router.
be sure to specify an ip address that is on one of the same networks as the firebox.
6 click ok.
the setup routes dialog box lists the newly configured network route.
7 click ok.
the route data is written to the configuration file.