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38 01-28006-0024-20041026 Fortinet Inc.
Starting the setup wizard NAT/Route mode installation
2 Repeat for all user-defined interfaces that you have configured.
The example in Figure 11 shows an internal network connected to user-defined
interface 1 and an external network connected to user-defined interface 4.
Figure 11: Example FortiGate-800/800F user-defined interface connections
Configuring the networks
If you are running the FortiGate unit in NAT/Route mode, the networks must be
configured to route all Internet traffic to the IP address of the FortiGate interface to
which they are connected.
If you are using the FortiGate unit as the DHCP server for your internal network,
configure the computers on your internal network for DHCP.
Make sure that the connected FortiGate unit is functioning properly by connecting to
the Internet from a computer on the internal network. You should be able to connect to
any Internet address.
In NAT/Route mode, you use the modem interface as either a backup interface or
standalone interface to the Internet.
In backup mode, the modem interface automatically takes over from a selected
ethernet interface when that ethernet interface is unavailable.
Esc Enter
CONSOLE
INTERNAL EXTERNAL DMZ HA 123
4USB
8
PWR
Internet
User-defined
Interface 1
User-defined
Interface 4
FortiGate-800
Internal Network
Hub or Switch
Public Switch or Router