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IEEE 802.1X is an IEEE Standard for port-based network access control (PNAC). It is part of the IEEE 802.1 group of networking protocols. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN.
IEEE 802.1X RADIUS Usage Guidelines: September 2003: 802.1X: RFC 4014: RADIUS Attributes Suboption for the DHCP Relay Agent Information Option: February 2005: RFC 4372: Chargeable User Identity: January 2006: RFC 4590: RADIUS Extension for Digest Authentication: July 2006: Obsoleted by RFC 5090: RFC 4668: RADIUS Authentication Client MIB for ...
MS-CHAP is used as one authentication option in Microsoft's implementation of the PPTP protocol for virtual private networks.It is also used as an authentication option with RADIUS [2] servers which are used with IEEE 802.1X (e.g., WiFi security using the WPA-Enterprise protocol).
Many vendors (including Cisco) have turned to support dynamic VLAN assignments using the 802.1X authentication protocol with a Radius server that has additional attributes designating the VLAN. Details
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.
Internet Authentication Service in the Microsoft Windows 2000 Resource Kit; Article describing how to log IAS (RADIUS) + DHCP to SQL; Configure IAS RADIUS for secure 802.1x wireless LAN at archive.today (archived 2012-12-06) How to self-sign a RADIUS server for secure PEAP or EAP-TTLS authentication at archive.today (archived 2012-12-05)
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.
A basic form of NAC is the 802.1X standard. Network access control aims to do exactly what the name implies—control access to a network with policies, including pre-admission endpoint security policy checks and post-admission controls over where users and devices can go on a network and what they can do.