Fortinet fortigate-200a Installationsanweisungen
FortiGate-200A, FortiGate-300A, FortiGate-400A, and FortiGate-500A FortiOS 3.0 MR4 Install Guide
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Planning the FortiGate configuration
Configuring the FortiGate unit
You can add firewall policies to control whether communications through the
FortiGate unit operates in NAT or Route mode. Firewall policies control the flow of
traffic based on the source address, destination address, and service of each
packet. In NAT mode, the FortiGate unit performs network address translation
before it sends the packet to the destination network. In Route mode, there is no
address translation.
FortiGate unit operates in NAT or Route mode. Firewall policies control the flow of
traffic based on the source address, destination address, and service of each
packet. In NAT mode, the FortiGate unit performs network address translation
before it sends the packet to the destination network. In Route mode, there is no
address translation.
You typically use NAT/Route mode when the FortiGate unit is operating as a
gateway between private and public networks. In this configuration, you would
create NAT mode firewall policies to control traffic flowing between the internal,
private network and the external, public network (usually the Internet).
gateway between private and public networks. In this configuration, you would
create NAT mode firewall policies to control traffic flowing between the internal,
private network and the external, public network (usually the Internet).
Figure 8: NAT/Route mode network configuration for a FortiGate-200A.
NAT/Route mode with multiple external network connections
In NAT/Route mode, you can configure the FortiGate unit with multiple redundant
connections to the external network (usually the Internet).
connections to the external network (usually the Internet).
For example, you could create the following onfiguration:
• Port 1 is the default interface to the external network (usually the Internet)
• Port 2 is the interface to the internal network
• Port 3 is the redundant interface to the external network
• Port 2 is the interface to the internal network
• Port 3 is the redundant interface to the external network
Figure 9: Multiple internet connection configuration for a FortiGate-400A.
Note: If you have multiple internal networks, such as a DMZ network in addition to the
internal, private network, you could create route mode firewall policies for traffic flowing
between them.
internal, private network, you could create route mode firewall policies for traffic flowing
between them.
Internet
DMZ1
10.10.10.1
Internal network
192.168.1.3
DMZ network
Route mode policies
controlling traffic between
Internal networks.
controlling traffic between
Internal networks.
NAT policies controlling
traffic between internal
and external networks.
WAN1
204.23.1.5
Internal
192.168.1.99
10.10.10.2
Internet
NAT policies controlling traffic
between internal and external networks.
Port 2
204.23.1.5
Port 3
64.83.32.45
Port 1
192.168.1.1
Internal network
192.168.1.3