Manual

Chapter 3: Managing Access Points and Clusters
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2. Configure the following settings:
Filter
Click one of the following radio buttons:
Allow only stations in the list
Allow any station unless in list
Stations List
To add a MAC Address to Stations List, enter its 48-bit MAC address
into the lower text boxes, then click Add.
The MAC Address is added to the Stations List.
To remove a MAC Address from the Stations List, select its 48-bit MAC
address, then click Remove.
The stations in the list will either be allowed or prevented from
accessing the access point based on how you set the Filter.
3. Click Update to save your settings.