The CiscoSecure Access Control Server (ACS) is specialized security software that runs on Windows NT/2000 and Unix. The software simplifies and centralizes control for all user authentication, authorization, and accounting. Cisco ACS employs a web-based graphical interface, and can distribute the AAA information to hundreds or even thousands of access points in a network.
The CiscoSecure ACS software uses either the TACACS+ or the RADIUS protocol to provide this network security and tracking.
Each of your network devices can be configured to communicate with an ACS. Service providers can use ACS to centralize control of dial-up access. With a CiscoSecure ACS, system administrators may use a variety of authentication methods that are aligned with a varying degree of authorization privileges. Centralizing control of network access simplifies access management and helps establish consistent provisioning and security policies.
CiscoSecure ACS also acts as a central repository for accounting information. Each user session that is granted by the ACS can be fully accounted for and stored in the server. This accounting information can be used for billing, capacity planning, and security audits.