Depending on your requirements, you may be able to deploy the FortiGate unit
without changing its factory default configuration. If the factory default settings in

Table 11

are compatible with your requirements, all you need to do is configure your

internal network and then connect the FortiGate unit.

Table 11: FortiGate unit factory default configuration

Operating Mode NAT/Route mode.
Firewall Policy

One NAT mode policy that allows users on the internal network to access

any Internet service. No other traffic is allowed. All web and email traffic

is scanned for viruses.

External
interface

The External interface receives its IP address by DHCP from your

Internet Service Provider (ISP).

DHCP Server
on internal
network

The FortiGate unit functions as a DHCP server for your internal network.

If you configure the computers on your internal network to obtain an IP

address automatically using DHCP, the FortiGate unit automatically sets

the IP addresses of the computers in this range:
Starting IP: 192.168.1.1
Ending IP: 192.168.1.254
One IP address is reserved for the FortiGate internal interface:

192.168.1.99.