What is LEPS-MAC?
LEPS-MAC uses an additional column in the ACL (access-control list) to assign an individual passphrase consisting of any 8 to 63 ASCII characters to each MAC address. Authentication at the access point is only possible with the correct combination of passphrase and MAC address.
This combination makes the spoofing of the MAC addresses futile—and LEPS-MAC thus shuts out a potential attack on the ACL. If WPA2 is used for encryption, the MAC address can indeed be intercepted—but this method never transmits the passphrase over wireless. This greatly increases the difficulty of attacking the WLAN as the combination of MAC address and passphrase requires both to be known before an encryption can be negotiated.
LEPS-MAC can be used both locally in the device and centrally managed by a RADIUS server. LEPS-MAC works with all WLAN client adapters available on the market without any modification. Full compatibility to third-party products is assured as LEPS-MAC only involves configuration in the access point.
Compared to LEPS-U, the administrative overhead is slightly higher because the MAC address has to be entered for each device.