---
title: "IIS Error: Unauthorized: Authorization failed by an ISAPI/CGI application. Internet Information Services (IIS)"
slug: "iis-error-unauthorized-authorization-failed-by-an-isapicgi-application-internet-information-services-iis"
updated: 2024-04-01T17:22:57Z
published: 2024-04-01T17:22:57Z
canonical: "kb.pharos.com/iis-error-unauthorized-authorization-failed-by-an-isapicgi-application-internet-information-services-iis"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.pharos.com/llms.txt
> Use this file to discover all available pages before exploring further.

# IIS Error: Unauthorized: Authorization failed by an ISAPI/CGI application. Internet Information Services (IIS)

I receive this error message when browsing to the Nerve Center

HTTP Error 401.5 - Unauthorized: Authorization failed by an ISAPI/CGI application. Internet Information Services (IIS)

or

HTTP Error 401.3 - Unauthorized: Access is denied due to an ACL set on the requested resource. Internet Information Services (IIS)

---

See:

[http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B906474](http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B906474)

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