Figure 2.

The Cisco Secure ACS and its configuration. The AP was configured to use ACS AAA services for the Extensible Authentication Protocol (EAP)-enabled wireless devices over the WLAN. A Windows 2000 Server running Active Directory (AD) was used to mimic a network access server (NAS) to negotiate with ACS through the Remote Access Dial-in User Service (RADIUS) protocol. The NAS had an enabled RAS connection for the ACS.