Intranet ASP.NET website windows authentication not working

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Even after entering correct credentials all users on the network get the below error
when trying to open this asp.net app hosted on IIS server with windows authentication only no anonymous access

401 - Unauthorized: Access is denied due to invalid credentials.
You do not have permission to view this directory or page using the credentials that you supplied.

I have added domain authenticated users permission to app folder
The IIS version is 10 on Win 10 pro system

What I have tried:

I added IUSR in folder permissions

Posted 14-Mar-19 21:53pm

Christopher Fernandes

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MadMyche 15-Mar-19 7:15am

Show the relevant code on how you added the permissions, such as the entries in the Web.config

Christopher Fernandes 15-Mar-19 8:09am

F-ES Sitecore 15-Mar-19 7:43am

Are you browsing to the site by the computer name, eg http://computername/ and does "computername" have any periods (".") in it?

Christopher Fernandes 15-Mar-19 7:59am

http://ipaddress:portnumber/subfolder/home.aspx

F-ES Sitecore 15-Mar-19 8:11am

Why are you using the ip, does it not work with just the computer name? There are lots of things needed for windows auth to work, we can't access your network so we don't know how anything is configured so it's hard to say what the issue might be. google for things like "windows authentication ip address" to see possible issues and solutions.

Christopher Fernandes 15-Mar-19 8:20am

it was working until a few days ago even with ipaddress suddenly started this issue yesterday.

F-ES Sitecore 15-Mar-19 9:11am

Then something on your network has changed.

Christopher Fernandes 15-Mar-19 8:19am

i have followed this article https://www.mikesdotnetting.com/article/216/windows-authentication-with-asp-net-web-pages

Christopher Fernandes 15-Mar-19 8:10am

I think the issue is that the server on which the app is hosted cannot access the Active Directory server. Hence cannot validate user credentials.

MadMyche 15-Mar-19 10:09am

Sounds like its time to call the network administrator

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