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IIS Support Blog
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1,536

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...
3,575

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....
3,338

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...
2,638

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 ...
4,994

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...
1,656

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 ...
2,822

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...
3,760

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...
13.5K

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?
5,928

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...
4,651

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 ...
4,777

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 ...
4,342

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 ...
5,207

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 ...
6,644

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 ...
8,680

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...
8,944

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...
10.5K

Certification Authority not showing up in IIS Server Certificates Dialog

Hugo_Durana on Oct 20 2022 03:30 PM
Got an Online Certification Auhtority that is not showing up in IIS when you are trying to renew a certificate? If so, t...

Latest Comments

mhaslhofer
in ConfigurationErrorsException due to targetFramework mismatch on Apr 07 2024 02:11 AM
Thanks mate!This post helped us yesterday evening, during a web-server migration to Windows Server 2022.It's still an issue as of April 2024.(Repair did not work for us - we added the necessary Registry keys manually)
0 Likes
Georgiana27
in Reading a FREB log, a Failed Request Tracing: IIS request processing pipeline execution on Mar 08 2024 11:37 AM
Excellent. And we have even a better tool to read the FREB here NL-Cristi/FrebSbS: WindowsForms app for analyzing FREB traces from IIS (github.com)
1 Likes
JohnBfromDE
in Reading a FREB log, a Failed Request Tracing: IIS request processing pipeline execution on Mar 05 2024 06:33 AM
The PS Script from @DK1 is really useful. Without it, examining the logs is painful. I wrapped it with a PS foreach to do a bulk convert, then could easily share the results with team members tracking down a difficult slowness issue. Now if only we understood why many of the XML files seem to trunca...
1 Likes
abnerssantana
in Solution for “Request Entity Too Large” error on Feb 23 2024 09:38 AM
Thanks!
0 Likes
bphillus
in FTP “530 User cannot log in” error and solution on Feb 20 2024 07:27 AM
for those that still get the 503 error after setting all the correct permissions (IIS FTP Authentication=basic, IIS FTP Authorization=allow access to user, Windows File permissions, and FTP isolation rules), you MUST restart the FTP site in order for the changes to the IIS FTP Authentication, Author...
0 Likes