Transparent Mode - Fortinet FortiGate FortiGate-3600 Installation Manual

Planning the FortiGate configuration

Transparent mode

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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
204.23.1.5 192.168.1.1
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, 3, and 4 can connect to other network segments.
• Port 5/HA can connect to another network segment. Port 5/HA can also connect to
other FortiGate-3600s if you are installing an HA cluster.
01-28005-0027-20041101
FortiGate-3600 Unit
in NAT/Route mode
Esc Enter
1 2 3 4 5/HA
NAT mode policies controlling
traffic between internal and
external networks.
FortiGate-3600 Unit
in Transparent mode
Esc Enter
1 2 3
External
192.168.1.2
Management IP
Transparent mode policies
controlling traffic between
internal and external networks
Internal network
Internal
192.168.1.1
Route mode policies
POWER 1 2 3
Hi-Temp 4 5/HA INT EXT
controlling traffic between
INTERNAL EXTERNAL internal networks.
Port 3
DMZ network
10.10.10.2
POWER 1 2 3 Internal network
Hi-Temp 4 5/HA INT EXT
4 5/HA INTERNAL EXTERNAL
Internal
Getting started
192.168.1.3
10.10.10.23
192.168.1.3
Fortinet Inc.