Technical Tip: How to configure multiple interfaces on a firewall policy (GUI)
Description
Solution
- Enable the Multiple Interface Policies under System -> Feature on GUI.
- Once this option has been enabled in the GUI, enable it in the CLI.
Once enabled, refresh the firewall page. Then, go to the firewall policy and add multiple interfaces as required.

Note:
On versions before 7.4, using multiple incoming/outgoing interfaces in the firewall policy will cause the 'Interface Pair View' to be greyed out as shown below. Starting from FortiOS 7.4, 'Interface Pair View' will not be greyed out.

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