Transparent Mode - Fortinet FortiGate FortiGate-3000 Installation Manual

Getting started

Transparent mode

FortiGate-3000 Installation Guide
Figure 6: Example NAT/Route multiple internet connection configuration
External
204.23.1.5
Internet
Port 1
64.83.32.45
In Transparent mode, the FortiGate unit is invisible to the network. Similar to a
network bridge, all FortiGate interfaces must be on the same subnet. You only have to
configure a management IP address so that you can make configuration changes.
The management IP address is also used for antivirus and attack definition updates.
You typically use the FortiGate unit in Transparent mode on a private network behind
an existing firewall or behind a router. The FortiGate unit performs firewall functions,
IPSec VPN, virus scanning, IPS, web content filtering, and Spam filtering.
Figure 7: Example Transparent mode network configuration
Gateway to
public network
10.10.10.2
204.23.1.5
Internet
(firewall, router)
You can connect up to six network segments to the FortiGate unit to control traffic
between these network segments.
• External can connect to the external firewall or router.
• Internal can connect to the internal network.
• Port 1, 2, and 3 can connect to other network segments.
• Port 4/HA can connect to another network segment. Port 4/HA can also connect to
other FortiGate-3000s if you are installing an HA cluster.
01-28005-0026-20041101
FortiGate-3000 Unit
in NAT/Route mode
Esc Enter
1 2 3
NAT mode policies controlling
traffic between internal and
external networks.
FortiGate-3000 Unit
in Transparent mode
Esc Enter
1 2 3
10.10.10.1
Management IP
Transparent mode policies
controlling traffic between
internal and external networks
Planning the FortiGate configuration
Internal network
192.168.1.3
Internal
192.168.1.1
POWER 1 2 3
Route mode policies
Hi-Temp 4/HA INT EXT
controlling traffic between
internal networks.
4/HA INTERNAL EXTERNAL
Port 2
DMZ network
10.10.10.2
10.10.10.23
Internal network
POWER 1 2 3
Hi-Temp 4/HA INT EXT
4/HA INTERNAL EXTERNAL
Internal
10.10.10.3
23