IIS – 401.3 – Unauthorized

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I am trying to get started with using IIS. I created a new site on IIS Manager, mapped it to a folder on my file system and added index.html to the folder. I have set the port to 85 for this site. When I try to access http://localhost:85/index.html, I get the following error message:

401.3 – unathorized – You do not have permission to view this directory or page because of the access control list (ACL)
configuration or encryption settings for this resource on the Web
server.

I gave read access to everybody on the folder and tried again. I could then access the page.

I then compared the properties of my folder with that of wwwroot. I found that wwwroot had read access on IIS_IUSRS…When I did the same on my folder and tried again, I got the above error again.
I checkedthat anonymous access is enabled by default, but I still get this error.

Why does this happen? What is the correct way to resolve the problem?

Best Answer

I have struggled on this same issue for several days. It can be solved by modifying the security user access properties of the file system folder on which your site is mapped. But IIS_IUSRS is not the only account you must authorize.

  • In IIS management console, in the Authentication part of the configuration of your site, modify the "Anonymous authentication" line and check the account set as "Specific user" (mine is IUSR).
  • Give read and execution permission on the folder of your site to the account listed as the specific user.

OR

  • In IIS management console, in the Authentication part of the configuration of your site, modify the "Anonymous authentication" line by selecting "Identity of the application pool" instead of "Specific user".
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