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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 .
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.
EAP data is first encapsulated in EAPOL frames between the Supplicant and Authenticator, then re-encapsulated between the Authenticator and the Authentication server using RADIUS or Diameter. 802.1X authentication involves three parties: a supplicant, an authenticator, and an authentication server.
RADIUS is a standard for dedicated authentication servers. 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.
The domain controller is particularly needed in Microsoft environments when using Microsoft's Internet Authentication Service (IAS) or Network Policy Server (NPS) software to provide RADIUS services from the Authentication Server. [3] Here is a list of authenticated users as displayed in Linksys LGS528P Switch.
Jouni Malinen's hostapd is a user space daemon for access point and authentication servers. It can be used to create a wireless hotspot using a Linux computer. [1] It implements IEEE 802.11 access point management, IEEE 802.1X/WPA/WPA2/EAP Authenticators, RADIUS client, EAP server, and RADIUS authentication server.
FreeRADIUS is the most popular open source RADIUS server [3] and the most widely deployed RADIUS server in the world. [3] It supports all common authentication protocols , and the server comes with a PHP -based web user administration tool called dialupadmin .
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 has two substantial shortcomings.
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