HTTP 403 Forbidden "You do not have permission to view this directory or page using the credentials that you supplied."

Question

_{Friday, August 26, 2011 1:57 PM}

I have a high traffic website that running ASP.NET MVC 2 with .NET Framework 4.0.   This website is running on the IIS7.5.

We have more than 4 millions hits per day and we've got around 0.1% hits contains a abnormal HTTP 403 Forbidden error that occured in my homepage and some of the other pages.   The error message is "You do not have permission to view this directory or page using the credentials that you supplied.".  

Here is my runtime environment:

* Windows Web Server 2008 R2

* IIS 7.5

* .NET Framework 4.0

* ASP.NET MVC 2

* I have a File Server cluster that share a folder for my webfarm that contains only two web servers.
  ( By the way, the two servers are all contains around 0.1% errors.  The timing of these two server that error occurred are different. )

I'm sure every share permission and NTFS permission and IIS7 AppPool or Anonymous User are all set correctly because I have over 99.9% pages are served correctly to the users.  I really don't know why this happen. Does anyone who can help me point to the root cause and how to solve it or workaround it?

Thanks!

All replies (3)

_{Sunday, August 28, 2011 7:10 PM ✅Answered}

See if this article is of any help to you:

 http://mvolo.com/blogs/serverside/archive/2007/07/26/Troubleshoot-IIS7-errors-like-a-pro.aspx

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_{Friday, August 26, 2011 11:41 PM}

As far as I know, such authentication/authorization related weird issues are often from AD side. But to collect further information/evidence, you'd better involve Microsoft support, http://support.microsoft.com It is quite difficult to do it by yourself, because nobody is able to analyze every aspects.

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_{Saturday, August 27, 2011 1:52 PM}

I'll asking for them.  Thanks!