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local IIS asp.net mvc web application using windows authentication keep prompting for credentials

kneethan

11/21/23, 6:36 PM

I'm using windows 10 enterprise. localhost/mywebapp even not hitting home controller rather stuck on windows authentication prompt and no matter if I enter correct credential or bad credential it keep asking again and again. I'm not able to debug via code since it is not even going index controller. What is the best way to pin point the issue? I already checked IIS logs and not helpful at all. thanks in advance.

I captured the IIS log file in the following scenarios When I put url to localhost on edge browser ( tested in chrome also same result)

2022-11-22 16:35:52 ::1 GET /MyApp.Web - 80 - ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 2 5 110
2022-11-22 16:35:52 ::1 GET /MyApp.Web - 80 MyDomain\MyUname ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 2 5 299

After I put my credential the following output to IIS log :

2022-11-22 16:38:19 ::1 GET /MyApp.Web - 80 - ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 2 5 15
2022-11-22 16:38:19 ::1 GET /MyApp.Web - 80 MyDomain\MyUname ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 2 5 426
2022-11-22 16:38:19 ::1 GET /MyApp.Web - 80 MyDomain\MyUname ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 2 5 204

2022-11-22 16:40:29 ::1 GET /MyApp.Web - 80 - ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 2 5 26
2022-11-22 16:40:33 ::1 GET /MyApp.Web - 80 - ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 1 3221225581 85
2022-11-22 16:40:33 ::1 GET /MyApp.Web - 80 MyDomain\MyUname ::1 Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/107.0.0.0+Safari/537.36+Edg/107.0.1418.52 - 401 2 5 253

404

0 + 9

windows

iis

asp.net

asp.net-mvc

windows-authentication

Lex Li

11/21/23, 11:47 PM

When you said "I already checked IIS logs and not helpful at all", you'd better edit the question and include some rows for us to see. 401.1 or 401.3 matters a lot while you might not be able to identify.

kneethan

11/22/23, 5:07 PM

@LexLi Please see my updated post with IIS log outputs with various scenarios.

Lex Li

11/22/23, 6:18 PM

https://learn.microsoft.com/en-US/troubleshoot/windows-server/networking/accessing-server-locally-with-fqdn-cname-alias-denied#method-2-disable-the-authentication-loopback-check Can you try to disable loopback check and try again?

kneethan

11/22/23, 7:14 PM

@LexLi I did after some suggested in this forum but I still got the same looping authentication, is there any way to exactly pin point the issue ?

Lex Li

11/22/23, 7:19 PM

IIS simply passes the credentials to AD for verification. So there isn't much to do on this machine alone. Ask your domain administrators to assist.

kneethan

11/22/23, 8:03 PM

@LexLi to get the IT support on AD is bit hard for me , takes a lot of time ( need to create ticket and stuff), My windows authentication works fine for me to login to my machine. so that credentials are fine. I still dont' understand why it is keep pushing for uname/pwd for valication no mater what I put for uname/pwd ? I mean what is the reason of looping?

kneethan

11/23/23, 8:05 PM

@LexLi I have created simple asp.net web mvc and used local IIS with windows authentication and everything working as it suppose to, I mean correct credentials logs in then wrong credentials looped. ( I tested chrome incogntio mode), since if I use regular browser it will automatically logged in. So is this prove my AD is ok?? where can I narrow down the issue now?

kneethan

11/28/23, 3:22 PM

I was able to resolve (not a real solution) this Looping issue by unistalling IIS -->WWW Services --> Security -->URL Authorization . @LexLi this will give any hint of my looping issue??

bjoster

11/29/23, 8:06 PM

Persistent IIS domain authentication is not supported on ::1 and 127.0.0.1 (your local loopback addresses) and does have it's difficulties on the local machine. Please use logs from a remote client.

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