Home/ Questions/Q 7657329
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-31T13:00:12+00:00

I am just starting to learn ASP.NET. I opened a default ASP.NET application and

  • 0

I am just starting to learn ASP.NET. I opened a default ASP.NET application and changed the web.config file to enable Windows authentication.

<authentication mode="Windows">
</authentication>

When I run from VS using the asp.net development server, it is able to detect my windows login and display it.
I tried publishing it to the IIS server 7.5 in the same PC and ran from there. Now my windows login is not getting detected.
I have enabled the Windows Authentication from the Authentication feature in IIS.
What else I might be missing in this case?

Thanks..

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Try disabling Anonymous Authentication in IIS 7.5 for that web-site.

    • Open IIS Console.
    • Select website.
    • Double-click “Authentication”
    • Ensure “Anonymous Authentication” is disabled

    Only “Windows Authentication” should be enabled for your purposes.

    The reason this works is that a browser will perform the first request anonymously. If anonymous authentication is enabled this request will succeed, and so the web-server will have no idea who you are.

    If you use a tool like Fiddler to examine the network traffic between you and the server, you will notice that you actually get 3 requests if Windows Authentication is the only configured method. The requests get the following responses:

    • Request 1: “Please can I log-in anonymously?”
    • Response 1: “NO!!!” [HTTP Status Code 401]
    • Request 2: “Alright, what do you support?”
    • Response 2: “I support Windows Authentication” [HTTP Status Code 401]
    • Request 3: “Alright – here’s my Windows token”
    • Response 3: “Hi RB, here’s your web-page” [HTTP Status Code 200]
    • 0