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IIS Support Blog
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3,313

Event ID 2269 (HTTP.SYS communication error)

Nedim on May 25 2021 01:30 PM
The worker process for app pool 'DefaultAppPool' failed to initialize the http.sys communication
9,278

BREACH vulnerability

Nedim on May 25 2021 01:27 PM
BREACH attack works by trying to guess the secret keys in a compressed and encrypted response
10.3K

INET_E_RESOURCE_NOT_FOUND error

Nedim on May 25 2021 01:26 PM
Can’t reach this page. There was a temporary DNS error. Error code: INET_E_RESOURCE_NOT_FOUND
10.9K

417 Expectation Failed error

Nedim on May 25 2021 01:24 PM
417 status code refers to an issue with the Expect header in the request
3,201

Failed Request Tracing is not creating logs

Nedim on May 25 2021 01:22 PM
Things to do if Failed Request Tracing (FREB) doesn't create log files
5,694

Remove folder/application names from URLs

Nedim on May 25 2021 01:19 PM
How to remove folder name from a path like this: http://testsite.com/testapp/default.htm
26.6K

Block an IP address accessing the application

Nedim on May 25 2021 01:17 PM
If you suspect a malicious activity, you can block the IP address in IIS
10.6K

Collect memory dumps for a first-chance exception, when it occurs

Pingulea on Apr 16 2021 08:38 AM
Illustrated steps to take when we need to capture a first-chance exception with a memory dump, for analysis
3,855

Timeout Issue Caused by Idle Time-Out Action

Nedim on Mar 26 2021 11:01 AM
While navigating the pages in an application, the page was spinning for about a minute and giving a timeout error.
41.1K

Keyset does not exist

Nedim on Mar 26 2021 10:59 AM
IIS may display “Keyset does not exist” error while trying to set application pool identity.
11K

Application Request Routing is Missing in IIS Manager

Nedim on Mar 26 2021 10:58 AM
Even if you install Application Request Routing (ARR), it may not show up in IIS Manager
2,835

401 Custom Error Page Breaks Windows Authentication

Nedim on Mar 26 2021 10:54 AM
Using IIS Manager for adding a custom page for 401 status code may cause issues with Windows Authentication
9,058

The data is invalid error

Nedim on Mar 26 2021 10:53 AM
Event 7023: “The Windows Process Activation Service service terminated with the following error: The data is invalid.”
4,295

Collect traces of first-chance exceptions occurring in app

Pingulea on Mar 26 2021 06:14 AM
Illustrated steps to take when we want to see what kind of exceptions occur in a process
6,112

Memory dumps at process termination caused by second-chance exception

Pingulea on Mar 25 2021 07:57 AM
Illustrated steps to take when we need to capture a process-crashing exception with a memory dump, for analysis
12.8K

About exceptions and capturing them with dumps

Pingulea on Mar 25 2021 07:28 AM
Explaining for the less experienced engineers about exceptions and collecting the dumps for analysis.
4,401

Publish Azure Bot Framework Composer Bot to already existing Resource Group.

Sai_Teja_Nagamothu on Feb 05 2021 12:36 PM
Follow the same steps mentioned here Publish a bot to Azure - Bot Composer | Microsoft Docs However to publish Azure Bot...
2,358

ASP.NET ActiveDirectoryMembershipProvider and port 445 (SMB)

MattHamrick on Dec 22 2020 06:11 PM
While AD Membership is no longer recommended for use (use ADFS or something more modern instead), and is no longer being...
6,274

How to change notification text when bot sends an adaptive card in Microsoft Teams?

Sai_Teja_Nagamothu on Dec 01 2020 08:28 AM
When bot sends an adaptive card, Microsoft Teams notification sent a "Sent a card" message. Like shown below:
6,243

“Metadata contains a Reference cannot be resolved” error for WCF service

Nedim on Nov 30 2020 02:48 PM
While trying to make a WCF service to connect Dynamics 365, “Metadata contains a Reference cannot be resolved” error may...
8,002

Web Management Service issue (2147483656)

Nedim on Nov 30 2020 02:46 PM
If Web Management Service service doesn’t start, SCCM management points may run into issues.
15.7K

System.Security.Cryptography.CryptographicException: The payload was invalid

Jason Xu on Nov 20 2020 11:33 AM
When you are using your .Net Core application to decrypt a string from a different machine than it was encrypted, you ma...
1,343

Underpinnings of Bot analytics

mertozturk on Nov 12 2020 11:33 PM
Is your bot analytics blade showing unexpected information. You should read this article!

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