GIGABYTE AirCruiser GN-BR30N-RH - Manual (Page 35)

GN-BR30N-RH 2.4GHz AirCruiser N300 Wireless Router
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WPA PSK Re-key
A user without a RADIUS server, may specify generating a new WPA PSK key
more frequently than each time he connects to the network.
WPA PSK Re-key Timer
Specify time (in minutes) for expiration of the current WPA PSK key
The MAC Access Control Tab
The MAC Access Control screen allows you to specify the Media Access
Controller (MAC) address of up to 32 devices on your network. Only those
devices listed in the table will have access to transmit data through the
GN-BR30N-RH. In this way, even if someone manages to obtain all the
information necessary to connect to your network, if their MAC address is not
permitted, they still cannot connect. Keep in mind, however that MAC
addresses can be spoofed, so it is not a panacea but rather another component
of your existing security process. Enable the feature, then key in the MAC
addresses to be allowed. Enter the MAC in the form separated by colon.
The default setting is Disable.