Fortinet FortiGate 100 - Manual (Page 63)

Transparent mode installation Example default route to an external network
FortiGate-100 Installation and Configuration Guide
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Example default route to an external network
Figure 10 shows a FortiGate unit where all destinations, including the management
computer, are located on the external network. To reach these destinations, the
FortiGate unit must connect to the “upstream” router leading to the external network.
To facilitate this connection, you must enter a single default route that points to the
upstream router as the next hop/default gateway.
Figure 10: Default route to an external network
General configuration steps
1 Set the FortiGate unit to operate in Transparent mode.
2 Configure the Management IP address and Netmask of the FortiGate unit.
Note: When adding routes to the FortiGate unit, add the default route last so that it
appears on the bottom of the route list. This ensures that the unit will attempt to match
more specific routes before selecting the default route.