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IIS Support Blog

  • 377 Blog Articles
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535

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

Jason Xu on 11-20-2020 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...
686

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

Sai_Teja_Nagamothu on 11-17-2020 06:25 AM
Follow the same steps mentioned here Publish a bot to Azure - Bot Composer | Microsoft Docs However to publish Azure Bot...
545

Underpinnings of Bot analytics

mertozturk on 11-12-2020 11:33 PM
Is your bot analytics blade showing unexpected information. You should read this article!
1,178

Duplicate collection entry of type (0x800700b7)

Nedim on 11-04-2020 06:15 PM
Error after enabling FREB: "Cannot add duplicate collection entry of type ‘add’ with unique key attribute ‘path’ set to ...
1,149

CLSID failed (800700b7)

Nedim on 11-04-2020 06:12 PM
If IIS Manager doesn’t open because of the error below, it may cause delays in maintenance and migrations.
1,097

W3C Logging Service failure (ID 6005)

Nedim on 11-04-2020 06:11 PM
In some cases, Event Viewer may display “W3C Logging Service failed to connect to the pipe server” error after applicati...
847

Unexpected end of file has occurred

Nedim on 10-30-2020 01:51 PM
If there is something wrong with the IIS config file, IIS Manager may crash with this error
763

AspNetInitClrHostFailureModule (0x80131704 – 2148734724)

Nedim on 10-30-2020 01:48 PM
While troubleshooting a 500 error, Failed Request Tracing (FREB) may display AspNetInitClrHostFailureModule error with 0...
965

Enabling Bot Telemetry for Application Insights

mertozturk on 10-27-2020 05:36 AM
Do you really now, what you will get by enabling the new Bot Telemetry Logger?
815

How bots work

mertozturk on 10-27-2020 01:23 AM
A brief introduction to Bot Framework SDK 
2,570

HTTP response 503 Service Unavailable from IIS: one common generic cause

Viorel-Alexandru on 09-28-2020 06:07 AM
WAS turns off the Application Pool due to repeated crashing exceptions in the Web application. Look for the exception ca...
754

ANCM not reading “ASPNETCORE_ENVIRONMENT” variable from local environment.

Ramchandra_Kudtarkar on 09-11-2020 01:17 PM
After upgrading the asp.net core application to asp.net core 3.1 version, application is not able to read the “ASPNETCOR...
2,941

Checking the certificate trust chain for an HTTPS endpoint

Viorel-Alexandru on 09-07-2020 04:14 AM
Check the trust when the client doesn't handshake the TLS with the server
2,618

The request is not supported (0x80070032)

Nedim on 08-24-2020 06:53 AM
IIS uses bindings to determine where to redirect requests. These bindings can be secured (https – mostly on port 443) or...
1,440

MachineKeys folder fills up quickly

Nedim on 08-24-2020 06:38 AM
MachineKeys folder stores certificate keys that are used by IIS. This folder my fill up with thousands of files in a sho...
1,727

Custom Error Page vulnerability

Nedim on 08-24-2020 06:37 AM
IIS comes with default error pages. In order to help troubleshooting issues, these error pages may provide detailed info...
2,654

Web.config file maximum size and count

Nedim on 08-24-2020 06:32 AM
IIS refuses to read web.config if it exceeds a threshold. This check is in place to prevent vulnerability attacks
1,787

Bad method token error

Nedim on 08-24-2020 06:28 AM
There is a known issue with 4.5.17 and lower versions that cause "Bad method token" error
682

Checking the FTP Sub status logged can help find the cause of problems.

michno on 08-11-2020 10:21 AM
Did you know that there is a sub status field in FTP logs? Like the IIS web site log, the sub status can be very helpful...
2,057

Event ID 7023: The Windows Process Activation Service terminated

Nedim on 08-07-2020 04:20 PM
If your web applications stop responding requests, WAS is one of the services you should check first. While troubleshoot...
1,815

Web Deploy issue ERROR_CONNECTION_TERMINATED

Nedim on 08-07-2020 04:18 PM
While publishing an application from Visual Studio to Azure App Service, you may come across this error message.
1,710

Timer_MinBytesPerSecond in HTTP.SYS logs

Nedim on 08-07-2020 04:16 PM
In a slowness issue I worked on, this record in HTTPERR file took my attention: Timer_MinBytesPerSecond
774

Set up a public page in Windows Authentication protected website

Nedim on 08-07-2020 04:12 PM
If all of the pages in your website is protected by Windows Authentication, use the configuration to enable public acces...
1,903

Nuget package for System.Net.Http on .NET Framework 4.7.2

Nedim on 08-07-2020 04:09 PM
Application with a dependency to the System.Net.Http Nuget package may break after upgrading .NET Framework version to 4...
1,852

The missing Server Hello in TLS handshake

Nedim on 08-07-2020 04:07 PM
If the server is not sending Server Hello package, the communication won’t be established and the customer is likely to ...
1,056

Crash at System.Web.LegacyAspNetSynchronizationContext.CallCallback

Jason Xu on 07-21-2020 10:37 AM
If you see crash at the following call stack, that mostly probably is because web application is currently configured to...
5,898

HTTP OPTIONS and Default page vulnerabilities

Nedim on 07-05-2020 12:46 PM
Simple ways for fixing HTTP OPTIONS and Default page vulnerabilities
1,611

Difference between SignalR unit and instance and SignalR pricing

Nedim on 07-05-2020 12:42 PM
Explaining the SignalR components and pricing model might be confusing for Azure users who are discovering this service.

Latest Comments

SarahZ2020
in Fusion Log Viewer (fuslogvw.exe) on 11-19-2020
If you could add your post into https://docs.microsoft.com/en-us/dotnet/framework/tools/fuslogvw-exe-assembly-binding-log-viewer It would be perfect.
0 Likes
AcmeStorm
in IIS and Url-Rewrite: rewriting the outbound response contents on 11-13-2020
Thank you very much. This is the file from IIS 10 on windows server 2016 <?xml version="1.0" encoding="UTF-8"?><configuration><system.webServer><rewrite><outboundRules><rule name="ReverseProxyOutboundRule1" preCondition="ResponseIsHtml1"><match filterByTags="None" pattern="href=(.*?)http://j:81/(.*?...
0 Likes
Nedim
in Manage IIS locally with a non-admin account on 10-23-2020
Hi @rvmishra , I have recently updated this post as there have been changes in this topic. There is currently no convenient way for non-admins to manage application pools. This is on purpose. We think it’s a security risk to allow non-admins to stop websites. Using manage.iis.net was a workaround bu...
0 Likes
vinnynguyen
in Host Header Vulnerability on 10-20-2020
<rule name="Host Header Validation" stopProcessing="true"> <match url="(.)" /> <conditions> <add input="{HTTP_HOST}" pattern="^([a-zA-Z0-9-_]+.)*domain.com$" negate="true" /> </conditions> <action type="Redirect" url="https://domain.com" /></rule>
0 Likes
rvmishra
in Manage IIS locally with a non-admin account on 10-18-2020
Hello @Nedim We have recently set up a Windows Server 2016 where I need to allow IIS Manager access to a Windows userwho is not a member of the "Administrators" Group I have tried following your article above but the user still gets an error when after specifying the site details Anything you can su...
0 Likes