Fortinet FortiGate Series Administration Manual page 342

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Static Route

Changing the gateway for the default route

Figure 179: Destinations on networks behind internal routers

192.168.10.1

192.168.20.0/24

To route packets from Network_1 to Network_2, Router_1 must be configured to use the

FortiGate internal interface as its default gateway. On the FortiGate unit, you would create

a new static route with these settings:

Destination IP/mask: 192.168.30.0/24

Gateway: 192.168.11.1

Distance: 10

To route packets from Network_2 to Network_1, Router_2 must be configured to use the

FortiGate dmz interface as its default gateway. On the FortiGate unit, you would create a

new static route with these settings:

Destination IP/mask: 192.168.20.0/24

Gateway: 192.168.10.1

Device: internal

Distance: 10

The default gateway determines where packets matching the default route will be

Note: If you are using DHCP or PPPoE FortiGate over a modem interface on your

FortiGate unit, you may have problems configuring a static route. After trying to either

Renew your DHCP license, or Reconnect the PPPoE connection, go to the CLI and enable

dynamic-gateway under config system interface for the modem interface. Doing

this will remove the need to specify a gateway for this interface's route. For more

information see

FortiGate CLI

To change the gateway for the default route

1 Go to Router > Static > Static Route.

192.168.11.1

192.168.30.0/24

FortiGate Version 4.0 MR1 Administration Guide

Router Static

01-410-89802-20090903

http://docs.fortinet.com/