- Go to “Firewall” -> “MAC Filter”. In “MAC Filter Mode” section, select “Reject”:-

- Under “MAC Filter List”:-
- if the device is connected to the router, select the device from the dropdown list of “MAC Address”.

- if the device is not connected to the router, type the MAC address of the device in “MAC Address” section.

- Click “+” button then click “Apply” button.
