If the MAC address of a WLAN client requesting to associate is not included in the list of permissible addresses, the Public Spot can alternatively authenticate the address via a RADIUS server.
To enable RADIUS authentication, the administrator selects one of the RADIUS servers that has defined in the device and saved to the list of providers.
In addition, the administrator defines a lifetime for the rejected MAC addresses. This lifetime is used by the Public Spot to prevent the RADIUS server from being flooded with repeated requests for MAC addresses which cannot be authenticated (without login) via the RADIUS server or MAC address table.
If a MAC address authentication is rejected by the RADIUS server, the Public Spot saves this rejection for the lifetime defined here. The Public Spot responds to further requests for the same MAC address directly and without forwarding them to the RADIUS server first.