Editing TACACS (section)

===TACACS===
TACACS is defined in <nowiki>RFC 1492</nowiki>, and uses (either [[Transmission Control Protocol|TCP]] or [[User Datagram Protocol|UDP]]) port 49 by default. TACACS allows a client to accept a username and password and send a query to a TACACS authentication server, sometimes called a TACACS daemon. It determines whether to accept or deny the authentication request and sends a response back. The TIP (routing node accepting dial-up line connections, which the user would normally want to log in into) would then allow access or not, based upon the response. In this way, the process of making the decision is "opened up" and the algorithms and data used to make the decision are under the complete control of whoever is running the TACACS daemon.