Password-protected directory is not allowing access "Access is denied due to invalid credentials" error code 401

Refers to:

  • Plesk 10.4 for Windows
  • Plesk 12.0 for Windows

Created:

2016-11-16 12:42:03 UTC

Modified:

2016-12-21 19:00:28 UTC

0

Was this article helpful?


Have more questions?

Submit a request

Password-protected directory is not allowing access "Access is denied due to invalid credentials" error code 401

Symptoms

Password-protected directory is not allowing access, regardless of the fact that valid credentials are used. IIS error 401 appears:

    Access is denied due to invalid credentials

Cause

Additional/custom ISAPI filter is enabled on domain that prevents password protection work.

Resolution

  1. Go to:

    IIS manager > host > Sites > domain.tld > ISAPI Filters

    And make sure ISAPI filter 'url_protect' is present:

    C:\\Program Files (x86)\\Parallels\\Plesk\\isapi\\urlprotect.dll

    All other url protect filters must be custom ISAPI filters.

  2. If you see any additional .dll ISAPI filters for url protect, such as:

    C:\Windows\SysWOW64\urlprotect.dll

Please remove them and check directory protection once again.

Have more questions? Submit a request
Please sign in to leave a comment.