System network

Adding VLAN subinterfaces

 

 

If the network uses IEEE 802.1 VLAN tags to segment your network traffic, you can configure a FortiGate unit operating in Transparent mode to provide security for network traffic passing between different VLANs. To support VLAN traffic in Transparent mode, you add virtual domains to the FortiGate unit configuration. A virtual domain consists of two or more VLAN subinterfaces or zones. In a virtual domain, a zone can contain one or more VLAN subinterfaces.

When the FortiGate unit receives a VLAN tagged packet at an interface, the packet is directed to the VLAN subinterface with matching VLAN ID. The VLAN subinterface removes the VLAN tag and assigns a destination interface to the packet based on its destination MAC address. The firewall policies for this source and destination VLAN subinterface pair are applied to the packet. If the packet is accepted by the firewall, the FortiGate unit forwards the packet to the destination VLAN subinterface. The destination VLAN ID is added to the packet by the FortiGate unit and the packet is sent to the VLAN trunk.

Figure 16: FortiGate unit with two virtual domains in Transparent mode

VLAN Switch or router

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FortiGate unit

 

 

 

 

 

VLAN1

 

 

Internal

root virtual domain

External

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VLAN1

 

 

 

VLAN1

 

 

 

 

 

 

 

 

 

 

 

VLAN2

 

 

 

 

 

 

 

 

VLAN2

VLAN1

VLAN1

 

 

 

 

 

 

 

 

VLAN3

 

 

 

 

 

 

 

 

 

VLAN3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VLAN Switch

Internet

VLAN2

 

 

 

 

VLAN trunk

New virtual domain

VLAN trunk

or router

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VLAN2

VLAN2

 

 

 

 

 

 

 

 

 

 

 

 

VLAN3

VLAN3

 

 

 

 

 

VLAN3

Figure 17 shows a FortiGate unit operating in Transparent mode and configured with three VLAN subinterfaces. In this configuration the FortiGate unit could be added to this network to provide virus scanning, web content filtering, and other services to each VLAN.

FortiGate-100A Administration Guide

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Fortinet 100A manual FortiGate unit with two virtual domains in Transparent mode

100A specifications

Fortinet 100A is a versatile network security device designed to provide comprehensive protection against various cyber threats while ensuring optimal network performance. As part of the FortiGate series, the 100A combines advanced security features with powerful hardware capabilities, making it suitable for small to medium-sized businesses.

One of the key features of the Fortinet 100A is its deep packet inspection technology. This capability allows the firewall to analyze both the header and payload of packets traversing the network, enabling it to detect and block malicious content effectively. The 100A can identify and mitigate a wide range of threats, including malware, intrusions, and application-layer attacks.

The FortiOS operating system powers the Fortinet 100A, offering a robust and user-friendly interface for configuration and management. With its unified security management console, administrators can efficiently monitor network traffic and enforce security policies across the organization. The system provides centralized logging and reporting features, enabling users to gain valuable insights into their security posture and respond swiftly to incidents.

The 100A supports multiple deployment modes, including transparent, NAT, and route modes. This flexibility allows organizations to integrate the device into their existing network architecture with ease. The firewall's high throughput capabilities ensure that network performance remains unaffected, even under heavy load from multiple users and devices.

Another notable aspect of the Fortinet 100A is its support for various VPN technologies, including IPsec and SSL VPN. This feature facilitates secure remote access for employees, enabling them to connect to the corporate network safely, regardless of their location. As remote work continues to be a norm in many sectors, this capability is critical for maintaining productivity and security.

In addition to these features, the Fortinet 100A provides comprehensive web filtering capabilities, protecting users from harmful websites and inappropriate content. This protection is essential for organizations looking to maintain a secure and productive environment.

With its combination of powerful security features, flexible deployment options, and robust performance, the Fortinet 100A stands out as an ideal solution for organizations seeking to bolster their cybersecurity measures while ensuring seamless connectivity for users. As cyber threats continue to evolve, investing in a capable device like the FortiGate 100A is crucial for maintaining a secure network infrastructure.