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Home/ Questions/Q 3407550
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Editorial Team
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Editorial Team
Asked: May 18, 20262026-05-18T05:45:53+00:00 2026-05-18T05:45:53+00:00

I have an ASP.NET web site set up to use windows authentication (not sure

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I have an ASP.NET web site set up to use windows authentication (not sure if I’ll be doing that again!).

If I use the following, I get access to the web site fine. I know that Windows auth is set up for the web site, and enabled in IIS.

<authorization>

    <allow users="*"/>

</authorization> 

However, I don’t want this site to be publicly accessible, so I use the following to grant access to a single user. I just get bounced for 3 attempts until I hit the error screen “401 – Unauthorized: Access is denied due to invalid credentials.”

Obviously the first question is – is the username, PC name correct… it is and I have tried every possible permutation. This worked fine on my previous dev box, and this new one is set up exactly the same.

<authorization>

    <allow users="PCNAME\MYUSER"/>
    <deny users="*"/>

</authorization>

ASP.NET logs don’t offer any insight.

UPDATE: I’ve just seen from my past notes that I have had this issue before. Authentication does actuall work as long as I’m not on the host PC.

Why is this? I can’t believe I’ve wasted so much time on this again…..!

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  1. Editorial Team
    Editorial Team
    2026-05-18T05:45:54+00:00Added an answer on May 18, 2026 at 5:45 am

    I’ve just seen from my past notes that I have had this issue before. Authentication does actuall work as long as I’m not on the host PC.

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