DNS Service on Interface

In Fortinet's FortiGate firewall devices, you can configure DNS (Domain Name System) settings on interfaces to control how the firewall handles DNS requests and resolves domain names. This can be useful for various purposes, such as controlling DNS traffic, enforcing security policies, and providing DNS services within the network.

Here's how you can configure DNS services on a FortiGate interface:

To Configure DNS Service on an Interface:

• Log in to the FortiGate Web Interface:

  • Open a web browser and enter the IP address of your FortiGate firewall.

• Navigate to the Interface Configuration:

  • In the web interface, go to "Network" and then "Interfaces."

• Select the Interface:

  • Choose the interface for which you want to configure DNS settings.

• Configure DNS Settings:

  • Under the selected interface configuration, you should find options related to DNS. These settings may include:

    • DNS Server: Specify the DNS server(s) that the FortiGate unit should use for DNS resolution.

    • DNS Mode: Choose whether the FortiGate unit should act as a DNS server, relay DNS requests to external servers, or disable DNS.

    • DNS Filter: If available, configure DNS filtering settings to control access to specific domains.

• Apply Changes:

  • After configuring the DNS settings, remember to apply the changes. This may involve clicking a "Save" or "Apply" button, depending on the FortiGate firmware version.

Example CLI Configuration:

Here is an example of the CLI (Command Line Interface) commands that you might use to configure DNS settings on an interface:

Replace <interface_name>, <primary_dns_ip>, and <secondary_dns_ip> with your actual interface name and DNS server IP addresses.

Important Considerations:

• Ensure that DNS settings are configured consistently with your network architecture and policies.

• Verify that the specified DNS servers are reachable and operational.

• Consider enabling DNS filtering to control access to specific domains based on your organization's security policies.

Always consult the FortiGate documentation for the specific firmware version you are using, as the interface and configuration options may vary. Additionally, testing the DNS configuration thoroughly is recommended to ensure that it meets your specific requirements.