> Would it be right to say that a RADIUS server in 802.1X authentication
> allows a client to be authenticated but can not unauthenticate a
> authenticated client and let the AP(Nas) know about this
> unauthentication. I guess it comes down to RADIUS server responds to
> clients but does not initiate talking to clients.

That's true, the radius server just responds to the NAS equipment (being
that wireless access point or a dial-up access server or a VPN access
server etc...).
 
> So, if I log on with my XP laptop through 802.1X successfully and then a
> few minutes later, the system admin logged off all users (including me)
> with the intent to force reauthentications.  But, my laptop thinks it's
> still authenticated and logged in.

Well if the admin, instructs the NAS equipment to log-off all the users
your laptop should know immediately that its disassociated from the wifi
AP. When your laptop ties to log-on again, and makes that request to the
AP, the AP will contact the radius server again.



-- 
damjan | ÐÐÐÑÐÐ
This is my jabber ID --> [EMAIL PROTECTED] <-- not my mail address!!!

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