Fortinet FortiGate 50A

NAT/Route mode installation Configuring the networks
FortiGate-50A Installation Guide 01-28005-0017-20041101 33
To connect the FortiGate-50A unit:
1 Connect the Internal interface to the hub or switch connected to your internal network.
2 Connect the External interface to the Internet.
Connect to the public switch or router provided by your Internet Service Provider. If
you are a DSL or cable subscriber, connect the External interface to the internal or
LAN connection of your DSL or cable modem.
Figure 9: FortiGate-50A NAT/Route mode connections
Configuring the networks
If you are running the FortiGate unit in NAT/Route mode, your networks must be
configured to route all Internet traffic to the IP address of the FortiGate interface to
which they are connected.
• For the internal network, change the default gateway address of all computers and
routers connected directly to your internal network to the IP address of the
FortiGate internal interface.
• For the DMZ network, change the default gateway address of all computers and
routers connected directly to your DMZ network to the IP address of the FortiGate
DMZ interface.
• For the external network, route all packets to the FortiGate external interface.
If you are using the FortiGate unit as the DHCP server for your internal network,
configure the computers on your internal network for DHCP.
Next steps
You can use the following information to configure FortiGate system time, to register
the FortiGate unit, and to configure antivirus and attack definition updates.
Refer to the FortiGate Administration Guide for complete information on configuring,
monitoring, and maintaining the FortiGate unit.
To set the date and time
For effective scheduling and logging, the FortiGate system date and time must be
accurate. You can either manually set the system date and time or configure the
FortiGate unit to automatically keep its time correct by synchronizing with a Network
Time Protocol (NTP) server.
1 Go to System > Config > Time.
2 Select Refresh to display the current FortiGate system date and time.
FortiGate-50A Unit
in NAT/Route mode
Internal network
Internal
192.168.1.99
192.168.1.3
External
204.23.1.5
NAT mode policies controlling
traffic between internal and
external networks.
POWER
Internet
INTERNAL EXTERNAL
LINK 100 LINK 100
PWR
STATUS
A