SMC Networks Barricade SMC2804WBR38 - Manual (Page 62)

Configuring the Wireless Barricade g Router
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MAC Filtering Table
The MAC Filtering feature of the Router allows you to control
access to your network to up to 32 clients based on the MAC
(Media Access Control) Address of the client machine. This ID is
unique to each network adapter. If the MAC address is listed in
the table, that client machine will have access to the network.