Amped Wireless APR175P - ProSeries High Power AC1750 Wi-Fi Access Point / Router - Manual (Page 150)

APR175P USER’S GUIDE
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To do so, go to Managed AP Settings (Top Menu), then Access
Points (Left Menu) to edit or add an Access Point Group. Under
the Profile Group Settings for the Access Point Group, you can
select a MAC Filter Group to use or you can override a MAC Filter
Group setting if one has already been set by the Default System
Group.
Note: Each Wi-Fi Network (WLAN/SSID) must also have MAC Filters selected as Additional Authentication
methods in order for MAC Filtering to work. This can be configured here: Managed AP Settings > Wi-Fi Settings
> Local Wi-Fi Networks (Add/Edit).