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IIS Support Blog
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997

Windows Server 2022 IIS web site TLS 1.3 does not work with client certificate authentication

Jason Xu on May 02 2024 11:30 AM
On Windows Server 2022, in IIS Web Site SSL binding, there is TLS 1.3 option enabled by default. However, if the web app...
1,772

customsd controls event log ChannelAccess and causing IIS ARR module unable to register

Jason Xu on Apr 17 2024 04:54 PM
Introduction of issue symptom: 1. With ARR module in IIS global module list, w3wp.exe got 503 at first request - the w3w...
4,159

APS.NET Temp file accumulation on server

PradeepSharma on Nov 28 2023 10:12 AM
Issue: Many of our customers have observed ASP.NET files piled up on many of the servers and size has gone up to 100 GB....
3,791

HTTP Request Smuggling in Microsoft IIS Server

PradeepSharma on Nov 28 2023 10:11 AM
Symptoms - Security scans show Request Smuggling vulnerability on IIS server. The vulnerability allows a remote attacker...
3,053

Content Security Vulnerability in ASP.NET(WebForms)

PradeepSharma on Nov 27 2023 07:48 PM
Issue : While implementing CSP(content security policy) in ASP.NET WEB Forms, few of the scripts are not working on the ...
5,962

IIS Short name Enumeration

PradeepSharma on Nov 27 2023 07:47 PM
Symptoms : The security scan tools show that Microsoft Internet Information Server (IIS) suffers from a vulnerability wh...
1,871

IIS manager GUI not working (Method not found)

PradeepSharma on Nov 27 2023 07:45 PM
Issue: IIS manager GUI not working. When user is opening up IIS manager and trying to browse the application pools then ...
3,046

Static Constructor Exceptions: A Rare Culprit That Requires App Restarts

manojdixit on Oct 18 2023 06:20 AM
If a static constructor throws an exception, the runtime doesn't invoke it a second time, and the type will remain unini...
4,091

Hosting ASP.Net Core application in AKS in Linux Container with Troubleshooting and Data Collection

jhaujala43 on Sep 29 2023 01:45 PM
Azure Kubernetes Services (AKS) is Azure's managed Kubernetes orchestrations services that simplify container deployment...
14.5K

ASP.NET Core: 503 Server has been shutdown

MattHamrick on May 26 2023 10:52 AM
What does 503 Server has been shutdown mean and what is the most likely cause and solution?
6,243

Azure B2C Signout (AADB2C90272: the id_token_hint parameter has not been specified in the request)

Sandeep_Goyal on Apr 19 2023 11:32 PM
Azure B2C Signout was not working for an application (AADB2C90272: the id_token_hint parameter has not been specified in...
4,878

Auditing Scenarios for Web Application Hosted in IIS - Part 4 - Files being written to folder

manojdixit on Feb 08 2023 11:04 AM
I have come across a few instances Root Cause Analysis (RCA) was requested for issues related to a web application that ...
5,002

Auditing Scenarios for Web Application Hosted in IIS - Part 3 - Website deleted

manojdixit on Feb 08 2023 11:04 AM
I have come across a few instances Root Cause Analysis (RCA) was requested for issues related to a web application that ...
4,552

Auditing Scenarios for Web Application Hosted in IIS - Part 2 - Permissions changed on Folder

manojdixit on Feb 08 2023 11:04 AM
I have come across a few instances Root Cause Analysis (RCA) was requested for issues related to a web application that ...
5,523

Auditing Scenarios for Web Application Hosted in IIS - Part 1 - SSL Binding Modified

manojdixit on Feb 08 2023 11:03 AM
I have come across a few instances Root Cause Analysis (RCA) was requested for issues related to a web application that ...
6,981

The Strange Case of inetmgr.exe.config

Khanita on Jan 10 2023 10:09 AM
If you've got assembly loading errors in your Inetmgr UI, this may be what you were looking for. Read along to find out ...
9,104

Azure App Service & ASP.NET Core 3.1 500.30 - One odd cause

MattHamrick on Jan 06 2023 03:54 PM
Just a scenario of one kind of problem that cropped up with a customer targeting .NET Core 3.1 on Azure App Services and...
9,404

ConfigurationErrorsException due to targetFramework mismatch

MattHamrick on Nov 15 2022 05:22 PM
Seeing the below exception in an ASP.NET application? If so then you can use this guide to figure out what's going on. E...

Latest Comments

MattHamrick
in Windows Authentication HTTP Request Flow in IIS on May 16 2024 07:15 AM
@gesown Regarding invalid SSL certs impacting authentication -- SSL cert exchange happens before HTTP, and they generally do not affect each other. If something happens during SSL cert exchange and HTTP doesn't happen, then Windows Auth won't happen either. If you're referring to mutual TLS, where t...
0 Likes
GmarEater
in ASP.NET Core: 503 Server has been shutdown on May 15 2024 09:36 PM
You save me, I had to deliver in few hours and stuck with this error ( I had two builder) thanx a lot
1 Likes
gesown
in Windows Authentication HTTP Request Flow in IIS on May 14 2024 05:12 PM
Also, how does invalid ssl certs impact authentication?
0 Likes
gesown
in Windows Authentication HTTP Request Flow in IIS on May 14 2024 05:11 PM
I am curious how different versions of .net assemblies used for web applications might fail to support http user identity authentication when using windows authentication.
0 Likes
walker786
in HTTP OPTIONS and Default page vulnerabilities on May 07 2024 03:14 AM
0 Likes