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Error 404--Not Found

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

The server has not found anything matching the Request-URI. No indication is given of whether the condition is temporary or permanent.

If the server does not wish to make this information available to the client, the status code 403 (Forbidden) can be used instead. The 410 (Gone) status code SHOULD be used if the server knows, through some internally configurable mechanism, that an old resource is permanently unavailable and has no forwarding address.

802.1X

In this era of ever-increasing mobility in wired and wireless scenarios, we can no longer always assume a user's access to a Layer 2 network will be via the same physical port of entry. This mobility has created a need to identify who is attempting to gain access to a given port. The 802.1X standard provides such a solution.

802.1X defines Extensible Authentication Protocol (EAP) over LANs (EAPOL).The standard encapsulates and leverages much of EAP, which was defined for dial-up authentication with Point-to-Point Protocol in RFC 2284.

Beyond encapsulating EAP packets, the 802.1X standard also defines EAPOL messages that convey the shared key information critical for wireless security.

From 802.1X provides user authentication, Network World Tech Update, 03/25/02.

diagram

Additional resources

Authentication and Authorization: The Big Picture with IEEE 802.1X
Overview from SANS.

Down and dirty with Wireless LAN security
iLabs team puts 802.1x standard to the interoperability test and brings deployment issues to light. Network World, 05/06/02.

Wireless/mobile research center
Latest news, analysis and opinion from Network World Fusion.


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