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RADIUS was developed by Livingston Enterprises in 1991 as an access server authentication and accounting protocol. It was later brought into IEEE 802 and IETF standards. RADIUS is a client/server protocol that runs in the application layer , and can use either TCP or UDP .
In computing, the Challenge-Handshake Authentication Protocol ( CHAP) is an authentication protocol originally used by Point-to-Point Protocol (PPP) to validate users. CHAP is also carried in other authentication protocols such as RADIUS and Diameter . Almost all network operating systems support PPP with CHAP, as do most network access servers.
Authentication requests and accounting information are forwarded by the V-AAA to the H-AAA, either directly or through a B-AAA. Current AAA servers communicate using the RADIUS protocol. As such, TIA specifications refer to AAA servers as RADIUS servers. While at one point it was expected that Diameter was to replace RADIUS, that has not happened.
TACACS. Terminal Access Controller Access-Control System ( TACACS, / ˈtækæks /) refers to a family of related protocols handling remote authentication and related services for network access control through a centralized server. The original TACACS protocol, which dates back to 1984, was used for communicating with an authentication server ...
Windows 2000 Server and Windows Server 2003 include the Internet Authentication Service (IAS), an implementation of RADIUS server. IAS supports authentication for Windows-based clients, as well as for third-party clients that adhere to the RADIUS standard. IAS stores its authentication information in Active Directory, and can be managed with ...
RadSec. RadSec is a protocol for transporting RADIUS datagrams over TCP and TLS. The RADIUS protocol is a widely deployed authentication and authorization protocol. The supplementary RADIUS Accounting specification [1] also provides accounting mechanisms, thus delivering a full AAA protocol solution. However, RADIUS is experiencing two major ...
SAML-based products and services. Security Assertion Markup Language (SAML) is a set of specifications that encompasses the XML -format for security tokens containing assertions to pass information about a user and protocols and profiles to implement authentication and authorization scenarios. This article has a focus on software and services ...
In practice, a supplicant is a software application installed on an end-user's computer. The user invokes the supplicant and submits credentials to connect the computer to a secure network. If the authentication succeeds, the authenticator typically allows the computer to connect to the network. IEEE 802.1x network-diagram example.