Edimax Technology AR-7266WNA - Manual (Page 90)

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"Delete All" button.
When you finish, click ‘Apply Changes’. You’ll see the following message
displayed on web browser:
Press ‘Continue’ to save the settings made and back to web management
interface; press ‘Apply’ to save the settings made and restart the router so the
settings will take effect after it reboots.
5.2.7.2. MAC Filtering
The MAC filtering feature allows you to define rules to allow or deny frames
through the router based on source MAC address, destination MAC address, and
traffic direction.