401 - Unauthorized On Server 2008 R2 IIS 7.5

Posted by mxmissile on Server Fault See other posts from Server Fault or by mxmissile
Published on 2010-04-29T15:46:23Z Indexed on 2010/04/29 15:57 UTC
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windows-server-2008-r2

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iis7.5

I have a web application deployed to Server 2008 IIS 7.5 box.

From remote it gives this error: 401 - Unauthorized: Access is denied due to invalid credentials. (remote = desktops on the same LAN)

Have tried several remote clients using different browsers, all the same result. (IE, FF, and Chrome)

Hitting the application from the desktop of the server itself works flawlessly.

The application is using Anonymous Authentication.

The application is written in .NET 4.0 Asp.Net using the MVC framework.

Sysinternals procmon returns these 2 results for each request: FAST IO DISALLOWED and PATH NOT FOUND.

I have 2 other MVC apps running fine on the same server. I have checked the security on the folders and they all match.

App runs fine on a Server 2008 IIS 7.0 box.

Nothing shows up in the Event log on the server related to this.

Pulling my hair out here, any troubleshooting tips?

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