System network

Adding VLAN subinterfaces

 

 

Note: If you are unable to change your existing configurations to prevent IP overlap, enter the CLI command config system global and set ip-overlap enable to allow IP address overlap. If you enter this command, multiple VLAN interfaces can have an IP address that is part of a subnet used by another interface. This command is recommended for advanced users only.

Figure 15 shows a simplified NAT/Route mode VLAN configuration. In this example, FortiGate internal interface connects to a VLAN switch using an 802.1Q trunk and is configured with two VLAN subinterfaces (VLAN 100 and VLAN 200). The external interface connects to the Internet. The external interface is not configured with VLAN subinterfaces.

When the VLAN switch receives packets from VLAN 100 and VLAN 200, it applies VLAN tags and forwards the packets to local ports and across the trunk to the FortiGate unit. The FortiGate unit is configured with policies that allow traffic to flow between the VLANs and from the VLANs to the external network.

Figure 15: FortiGate unit in Nat/Route mode

 

VLAN switch

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VLAN 100

VLAN 200

VLAN 100 network

VLAN 200 network

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10.1.2.2

 

 

 

FortiGate

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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External

 

 

 

 

 

 

 

 

192.168.110.126

 

172.16.21.2

 

 

 

802.1Q Trunk

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Internet

Adding VLAN subinterfaces

The VLAN ID of each VLAN subinterface must match the VLAN ID added by the IEEE 802.1Q-compliant router. The VLAN ID can be any number between 1 and 4096. Each VLAN subinterface must also be configured with its own IP address and netmask.

Note: A VLAN must not have the same name as a virtual domain or zone.

You add VLAN subinterfaces to the physical interface that receives VLAN-tagged packets.

To add a VLAN subinterface in NAT/Route mode

1Go to System > Network > Interface.

2Select Create New to add a VLAN subinterface.

3Enter a Name to identify the VLAN subinterface.

4Select the physical interface that receives the VLAN packets intended for this VLAN subinterface.

FortiGate-100A Administration Guide

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Fortinet 100A manual Adding Vlan subinterfaces, FortiGate unit in Nat/Route 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.