802.1x认证技术分析

802.1x Authentication Technology Analyse

IEEE 802.1x协议是目前业界最新的认证协议,802.1x认证基于逻辑端口把认证流和业务流进行分离。认证系统的端口分成两个逻辑端口:可控端口和非可控端口。可控端口传送业务报文,非可控端口只能传送认证协议报文。它通过认证前后打开/关闭可控端口来实现对用户接入的控制,从而实现对用户的物理端口的认证和控制。

The IEEE Std 802. 1X--2001 is a port based network access control protocol, the one of the newest authentication protocols. The authentication stream port is apart from the operation stream based on the logic. Authentication system port is make up of controlled or uncontrolled port. The operation message is transmitted on the controlled port while the authentication message is transmitted on the uncontrolled port. Therefore , control and authorization for users can be carry out.