Article ID: 3497, created on Dec 17, 2007, last review on Jul 3, 2015

  • Applies to:
  • Plesk 11.5 for Windows


Website is asking password when trying to access it. Also the following error might be displayed:

HTTP Error 401.3 - Unauthorized: Access is denied due to an ACL set on the requested resource.


  1. Password for user "IUSR_example" in system and in IIS mismatch.
  2. Computer name is equal or more than 15 symbols. It is knows Microsoft issue that IIS cannot handle queries in this case.


  1. Run the following command in CMD to fix the issue:

    "%plesk_bin%\websrvmng.exe" --configure-anonymous-access
  2. Rename computer with shorter name shorter than 15 symbols and perform reboot.

Search Words

HTTP Error 401.3 - Unauthorized

Authentication Required

85a92ca67f2200d36506862eaa6ed6b8 a914db3fdc7a53ddcfd1b2db8f5a1b9c 56797cefb1efc9130f7c48a7d1db0f0c 46a8e394d6fa13134808921036a34da8 bd7fc88cf1b01f097749ae6f87272128

Email subscription for changes to this article
Save as PDF