Transparent Mode - Fortinet FortiGate 60 Installation Manual

Getting started

Transparent mode

FortiGate-60 Installation Guide
Otherwise, security policy configuration is similar to a NAT/Route mode configuration
with a single Internet connection. You would create NAT mode firewall policies to
control traffic flowing between the internal, private network and the external, public
network (usually the Internet). If you have multiple internal networks, such as one or
more DMZ networks, in addition to the internal, private network, you can create route
mode firewall policies for traffic flowing between them.
Figure 7: Example NAT/Route multiple internet connection configuration
WAN1
204.23.1.5
Internet
WAN2
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 8: Example Transparent mode network configuration
Gateway to
public network
10.10.10.2
204.23.1.5
(firewall, router)
Internet
You can connect up to four network segments to the FortiGate unit to control traffic
between these network segments.
• A 4-port switch for connecting the FortiGate internal interface to your internal
network segment,
• WAN1 can connect to the external firewall or router,
• DMZ and WAN2 can connect to other network segments,
Note: The modem interface is not available in Transparent mode.
01-28008-0018-20050128
FortiGate-60 Unit
in NAT/Route mode
INTERNAL
PWR STATUS 1 2 3 4 DMZ WAN1 WAN2
LINK 100 LINK 100 LINK 100 LINK 100 LINK 100 LINK 100 LINK 100
Internal
192.168.1.1
NAT mode policies controlling
traffic between internal and
external networks.
FortiGate-60 Unit
in Transparent mode
INTERNAL
PWR STATUS 1 2 3 4
LINK 100 LINK 100 LINK 100 LINK 100
WAN1
Internal
Transparent mode policies
controlling traffic between
internal and external networks
Planning the FortiGate configuration
Internal network
10.10.10.1
Management IP
DMZ WAN1 WAN2
LINK 100 LINK 100 LINK 100
Internal network
10.10.10.3
192.168.1.3
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