Cisco WLC 2504 and ways to authenticate users

Question

Hi All,
     What is the ways to make user authenticate to WLC 2504 and what is the best and simple way and what is the differences btw each method _i mean for example need radius server or something else to be exist_ ?
     and any one can give me case study for this issue
System consist of Cisco 2504 and Cisco LAP 1140
Thanks

Answer 1

To implement radius based authentication is the best practice for the small & enterprise environment.
Information About RADIUS
Remote Authentication Dial-In User Service (RADIUS) is a client/server protocol that provides centralized security for users attempting to gain management access to a network. It serves as a backend database similar to local and TACACS+ and provides authentication and accounting services:
•Authentication—The process of verifying users when they attempt to log into the controller.
Users must enter a valid username and password in order for the controller to authenticate users to the RADIUS server. If multiple databases are configured, you can specify the sequence in which the backend database must be tired.
•Accounting—The process of recording user actions and changes.
Whenever a user successfully executes an action, the RADIUS accounting server logs the changed attributes, the user ID of the person who made the change, the remote host where the user is logged in, the date and time when the command was executed, the authorization level of the user, and a description of the action performed and the values provided. If the RADIUS accounting server becomes unreachable, users are able to continue their sessions uninterrupted.
RADIUS uses User Datagram Protocol (UDP) for its transport. It maintains a database and listens on UDP port 1812 for incoming authentication requests and UDP port 1813 for incoming accounting requests. The controller, which requires access control, acts as the client and requests AAA services from the server. The traffic between the controller and the server is encrypted by an algorithm defined in the protocol and a shared secret key configured on both devices.
You can configure multiple RADIUS accounting and authentication servers.For example, you may want to have one central RADIUS authentication server but several RADIUS accounting servers in different regions. If you configure multiple servers of the same type and the first one fails or becomes unreachable, the controller automatically tries the second one, then the third one if necessary, and so on. 
For more Information : http://www.cisco.com/en/US/docs/wireless/controller/7.2/configuration/guide/cg_security_sol.html#wp2149947