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Posted by =?Utf-8?B?SmFtZXMgTWNJbGxlY2Ug on June 6, 2008, 1:43 pm
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The NPS troubleshooting topic "Event ID 6273 — NPS Authentication Status"
might be of some assistance to you.
http://technet2.microsoft.com/WindowsServer2008/en/library/cafcb401-5e6e-4398-a571-efd93deb1eec1033.mspx
Also, just for future reference, the IAS/NPS Usenet newsgroup is
microsoft.public.internet.radius
"Roostermiester" wrote:
> I've setup Server 2008 NPS (which is also functioning as a DC) to
> authenticate wireless clients through a Cisco 2106 wireless lan controller.
> The computer certs are auto installed through Group Policy. However, when it
> attempts to authenticate I recieve the following error:
>
> Log Name: Security
> Source: Microsoft-Windows-Security-Auditing
> Date: 6/2/2008 12:24:38 PM
> Event ID: 6273
> Task Category: Network Policy Server
> Level: Information
> Keywords: Audit Failure
> User: N/A
> Computer: DC1.coaccess.com
> Description:
> Network Policy Server denied access to a user.
>
> Contact the Network Policy Server administrator for more information.
>
> User:
> Security ID: NULL SID
> Account Name: 99C4R41.coaccess.com
> Account Domain: COACCESS
> Fully Qualified Account Name: COACCESSC4R41.coaccess.com
>
> Client Machine:
> Security ID: NULL SID
> Account Name: -
> Fully Qualified Account Name: -
> OS-Version: -
> Called Station Identifier: 00-1F-CA-82-A1-80:coa
> Calling Station Identifier: 00-90-96-A3-E4-1F
>
> NAS:
> NAS IPv4 Address: 10.10.230.6
> NAS IPv6 Address: -
> NAS Identifier: COAWLC-2106
> NAS Port-Type: Wireless - IEEE 802.11
> NAS Port: 1
>
> RADIUS Client:
> Client Friendly Name: COAWLC
> Client IP Address: 10.10.230.6
>
> Authentication Details:
> Proxy Policy Name: Secure Wireless Connections Request
> Network Policy Name: -
> Authentication Provider: Windows
> Authentication Server: DC1.coaccess.com
> Authentication Type: EAP
> EAP Type: -
> Account Session Identifier: -
> Reason Code: 8
> Reason: The specified user account does not exist.
>
> I haven't been able to come up with any good reason for the error. I do
> recall having similar issues in a previous deployment and the solution was to
> modify the computer name, but that has not worked in this case. Any ideas
> what is causing this error?
> Thanks
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