[c-nsp] Wireless 802.1x authentication failures

[Edward Iong]

Dear All, 
 
We are using windows certificates for authenticate domain computers to connect wireless network.
 
In previous, it is working. Everyone can access wireless network. But now no one can get access, we found in the MS ISA event Log, it has a warning message as below
 
 
Event Type: Warning
Event Source: IAS
Event Category: None
Event ID: 2
Date:  6/14/2011
Time:  1:16:37 PM
User:  N/A
Computer: EDC-HKNT135
Description:
User host/BDNB00011.bd.ABC.com was denied access.
 Fully-Qualified-User-Name = ABC\BDNB00011$
 NAS-IP-Address = 10.XXX.XXX.51
 NAS-Identifier = BDWLC1
 Called-Station-Identifier =      :xxx
 Calling-Station-Identifier = 
 Client-Friendly-Name = BDWLC1
 Client-IP-Address = 10.XXX.XXX.51
 NAS-Port-Type = Wireless - IEEE 802.11
 NAS-Port = 1
 Proxy-Policy-Name = Use Windows authentication for all users
 Authentication-Provider = Windows 
 Authentication-Server = <undetermined> 
 Policy-Name = <undetermined> 
 Authentication-Type = EAP
 EAP-Type = <undetermined> 
 Reason-Code = 48
 Reason = The connection attempt did not match any remote access policy. 
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 00 00 00 00               ....    

Could anyone have any clues? or any suggestion for me to find out the issue come from?
 
 
Thanks and Regards,
 
 
Edward