Fortinet 800/800F manual NAT vs. Transparent mode, NAT mode

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Configuring

NAT vs. Transparent mode

Configuring

This section provides an overview of the operating modes of the FortiGate unit, NAT/Route and Transparent, and how to configure the FortiGate unit for each mode. There are two ways you can configure the FortiGate unit, using the web-based manager or the command line interface (CLI). This section will step through using both methods. Use whichever you are most comfortable with.

This section includes the following topics:

NAT vs. Transparent mode

Connecting to the FortiGate unit

Verify the configuration

Backing up the configuration

Additional configuration

NAT vs. Transparent mode

The FortiGate unit can run in two different modes, depending on your network infrastructure and requirements. You have a choice between NAT/Route mode and Transparent mode. Both include the same robust network security features such as antispam, antivirus, VPN and firewall policies.

NAT mode

In NAT/Route mode, the FortiGate unit is visible to the network. Like a router, all its interfaces are on different subnets.

In NAT mode, each port is on a different subnet, enabling you to have a single IP address available to the public Internet. The FortiGate unit performs network address translation before it sends and receives the packet to the destination network.

In Route mode, there is no address translation.

Figure 1: FortiGate unit in NAT mode

Internet

204.23.1.5

192.168.1.99

 

 

Router

NAT mode policies controlling traffic between internal and external networks.

Internal network

192.168.1.20

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.

FortiGate-800 and FortiGate-800F FortiOS 3.0 MR6 Install Guide

 

01-30006-0455-20080910

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Contents Install G U I D E Regulatory compliance TrademarksContents FortiGate Firmware Advanced configurationInstalling firmware from a system reboot using the CLI Testing new firmware before installingIndex Page Register your FortiGate unit IntroductionAbout the FortiGate-800/800F About this documentDocument conventions Typographic conventions Further ReadingCustomer service and technical support Fortinet Knowledge CenterComments on Fortinet technical documentation Environmental specifications InstallingRack mount instructions GroundingMounting To install the FortiGate unit into a rackPlugging in the FortiGate Connecting to the networkTo power on the FortiGate unit To power off the FortiGate unitNAT mode NAT vs. Transparent modeTo connect to the web-based manager Connecting to the FortiGate unitTransparent mode Connecting to the web-based managerTo connect to the CLI Connecting to the CLITo configure interfaces Go to System Network Interface Configuring NAT modeUsing the web-based manager Configure the interfacesAdding a default route and gateway Configure a DNS serverAdding firewall policies To modify the default gateway Go to Router StaticUsing the CLI To set an interface to use a static addressTo set an interface to use Dhcp addressing To set an interface to use PPPoE addressing To configure DNS server settingsTo add an outgoing traffic firewall policy To modify the default gatewayConfiguring Transparent mode Switching to Transparent modeTo switch to Transparent mode Go to System Status Source Address All Destination Interface To switch to Transparent mode Backing up the configuration Verify the configurationSet the time and date Restoring a configurationAdditional configuration Set the Administrator passwordUpdating antivirus and IPS signatures Configure FortiGuardAdditional configuration Protection profiles Advanced configurationFirewall policies Firewall policiesAntivirus options Configuring firewall policiesAntiSpam options Web filtering Logging Downloading firmware FortiGate FirmwareUsing the web-based manager Upgrading the firmwareReverting to a previous version Backup and Restore from a USB key Using the USB Auto-InstallTo revert to a previous firmware version To upgrade the firmware using the CLI Using the CLITo revert to a previous firmware version using the CLI Execute restore image namestr tftpip4Execute restore image namestr tftpipv4 Installing firmware from a system reboot using the CLIPress any key to display configuration menu To install firmware from a system rebootTo backup configuration using the CLI Restoring the previous configurationAdditional CLI Commands for a USB key To restore configuration using the CLITo configure the USB Auto-Install using the CLI To test the new firmware image Testing new firmware before installingTesting new firmware before installing Testing new firmware before installing Index Web filtering 35 web-based manager Page Page

800/800F specifications

Fortinet has established itself as a leader in cybersecurity solutions, and the FortiGate 800/800F series is a testament to this reputation. These next-generation firewalls are designed to deliver high-performance security for enterprise-level networks, providing a robust defense against a multitude of cyber threats.

One of the standout features of the FortiGate 800/800F is its advanced security processing unit (SPU) architecture, which ensures unparalleled threat detection and prevention capabilities. The inclusion of purpose-built chips allows for deep packet inspection at high speeds without hindering network performance. This architecture enables organizations to maintain high throughput while applying comprehensive security policies.

The FortiGate 800/800F series supports a wide array of security features, including intrusion prevention system (IPS), web filtering, and antivirus capabilities. These functionalities work together to monitor and protect against a range of cyber threats, from malware to sophisticated DDoS attacks. Additionally, the firewalls are equipped with FortiSandbox integration, providing automated malware analysis and ensuring that zero-day threats are effectively identified and neutralized in real-time.

In terms of networking capabilities, the FortiGate firewalls support advanced routing protocols, enabling seamless integration into existing network infrastructures. The series also includes support for VPN functionalities, which are crucial for secure remote access. With features like SSL inspection and secure SD-WAN, businesses can leverage flexible connectivity options while ensuring that sensitive data remains protected.

The FortiOS operating system enhances the FortiGate 800/800F series with centralized management capabilities, allowing administrators to configure and monitor security policies with ease. The intuitive user interface simplifies complex tasks, aiding in the rapid deployment and scalability of security measures across large networks.

High availability and redundancy features are also integral to the FortiGate 800/800F design. The series supports active-active and active-passive configurations, ensuring continuous protection and minimizing downtime during maintenance or unexpected failures.

In summary, the FortiGate 800/800F series stands out for its powerful performance, advanced security features, and robust networking capabilities. Organizations seeking to bolster their cybersecurity posture will find these firewalls to be invaluable tools in safeguarding their digital environments and ensuring business continuity in an increasingly complex threat landscape.