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Configure a Cisco Router with TACACS+ Authentication
Document ID: 13865
Introduction Prerequisites Requirements Components Used Conventions Authentication Add Authorization Add Accounting Test File Related Information

Introduction
This document describes how to configure a Cisco router for authentication with the TACACS+ that runs on UNIX. TACACS+ does not offer as many features as the commercially available Cisco Secure ACS for Windows or Cisco Secure ACS UNIX. TACACS+ software previously provided by Cisco Systems has been discontinued and is no longer supported by Cisco Systems. Today, you can find many available TACACS+ freeware versions when you search for "TACACS+ freeware" on your favorite Internet search engine. Cisco does not specifically recommend any particular TACACS+ freeware implementation. Cisco Secure Access Control Server (ACS) is available for purchase through regular Cisco sales and distribution channels worldwide. Cisco Secure ACS for Windows includes all the necessary components needed for an independent installation on a Microsoft Windows workstation. The Cisco Secure ACS Solution Engine is shipped with a pre−installed Cisco Secure ACS software license. Visit the Cisco Ordering Home Page ( registered customers only) to place an order. Note: You need a CCO account with an associated Service Contract to get the 90−day trial version for Cisco Secure ACS for Windows. The router configuration in this document was developed on a router that runs Cisco IOS® Software Release 11.3.3. Cisco IOS Software Release 12.0.5.T and later uses group tacacs+ instead of tacacs+, so statements such as aaa authentication login default tacacs+ enable appear as aaa authentication login default group tacacs+ enable. Refer to the Cisco IOS Software documentation for more complete information on router commands.

Prerequisites
Requirements
There are no specific requirements for this document.

Components Used
The information in this document is based on