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IIS Support Blog
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42.1K

Error 2146893818 (Event 7024 Invalid Signature)

Nedim on Dec 19 2019 11:03 AM
When you try to start IIS Admin Service, this error message may be displayed: Windows could not start the IIS Admin Serv...
5,340

0x800f0922 Update IIS-RequestMonitor failed

Nedim on Dec 19 2019 11:01 AM
Several features such as WebSocket Protocol, Tracing or Request Monitor can be installed in IIS server on need basis. I ...
36.9K

Make ports 80 and 443 listened in IIS server

Nedim on Dec 19 2019 10:59 AM
A website may not be accessible even though you have the correct binding. I came across to this issue recently in which ...
7,957

Disallowed Parent Path

Nedim on Nov 25 2019 11:36 AM
If you use a relative path in your ASP code, you may come across to “Disallowed Parent Path” error if your IIS server is...
33.5K

IIS reset issue (Restart attempt failed)

Nedim on Nov 25 2019 11:33 AM
You may run into “Restart attempt failed” error while trying to restart IIS: Restart attempt failed. The IIS Admin Servi...
65.6K

Host Header Vulnerability

Nedim on Nov 25 2019 11:31 AM
Browsers send Host Header to inform about the URL client wants to visit. Attackers can temper Host Header to manipulate ...
7,051

Windows Process Activation error (NetFx40_IIS)

Nedim on Nov 13 2019 10:19 AM
I have recently came across an issue that started occuring after updating .NET Framework in Windows Server. Here is the ...
14K

IIS binding limit (401.2 error)

Nedim on Nov 13 2019 10:16 AM
Windows authentication process can take place on the user-mode (IIS worker process) or kernel-mode (HTTP.SYS). For the k...
76.6K

Manage IIS locally with a non-admin account

Nedim on Nov 13 2019 10:14 AM
Administrators mostly use a local or domain account that has local admin rights to manage IIS. How about non-administrat...
107K

Anti-forgery token and anti-forgery cookie related issues

Nedim on Nov 05 2019 11:09 AM
Anti-forgery token is used to prevent CSRF (Cross-Site Request Forgery) attacks. Here is how it works in high-level
12.2K

System.UriFormatException

Nedim on Nov 05 2019 10:59 AM
System.UriFormatException with Invalid URI: The format of the URI could not be determined message is one of the errors t...
4,019

Issue with Advanced Logging creating logs

Nedim on Nov 05 2019 10:54 AM
IIS 7, 7.5, and 8 used Advanced Logging feature as a customized logging option. IIS 8.5 introduced Enhanced Logging whic...
7,981

Troubleshooting IIS apps: one structured approach

Pingulea on Oct 25 2019 06:46 AM
Let’s see the big picture: how an HTTP request travels from the client to IIS, how the response is generated, and what t...
14K

IISRESET internals

pcociuba on Oct 25 2019 12:52 AM
Within support, we sometimes see customers performing an IISReset command to restart their server or restart their websi...
17.5K

The file has not been pre-compiled error and solution

Nedim on Oct 24 2019 08:25 AM
This intermittent error may show up in Event Viewer when your application fails to load: “The file has not been pre-comp...
15.1K

Request based versus Session based Kerberos Authentication (or the AuthPersistNonNTLM parameter)

pcociuba on Oct 15 2019 10:34 AM
In this article, we will discuss how the AuthPersistNonNTLM authentication attribute affects Kerberos authentication to ...
13.4K

Using FREB to generate a dump on a long running request

pcociuba on Oct 03 2019 08:49 AM
Sometimes you have a long running request on your web-application for which you want to know why the processing time is ...
2,108

runAllManagedModulesForAllRequests is conflicting with skipManagedModules and taking precedence

Enamul Khaleque on Sep 25 2019 03:46 PM
As of this writing, when HTTP module is enabled, the warming HTML page defined in AppInt module may not load properly. G...
16.8K

How to use Azure file share in IIS Shared Configuration?

Nedim on Sep 25 2019 09:26 AM
System administrators can use the same configuration file across multiple IIS servers thanks to Shared Configuration fea...
9,951

Using URL Re-write in IIS to change Content-Disposition Headers

pcociuba on Sep 25 2019 03:09 AM
How can you handle the way in which browsers display attachment files that end users may download from your website? And...
5,456

Error: Rewrite/globalRules cannot be read

Nedim on Sep 24 2019 11:58 AM
IIS stores majority of its configuration in the applicationHost.config file. If there are syntax errors or missing entri...
196K

How to use X-Forwarded-For header to log actual client IP address?

Nedim on Sep 24 2019 11:22 AM
If your users jump through proxies and load balancers before accessing to your web application, the IP field in IIS logs...
33.9K

How to migrate a website using Web Deploy

Nedim on Sep 12 2019 08:02 AM
You may want to migrate your websites between IIS servers when you need OS upgrade. In many cases, migration is easier t...
7,741

OutOfMemoryException issue

Nedim on Sep 12 2019 07:56 AM
If your web application showing OutOfMemoryException error, the first thing to check for more details is the Event Viewe...
8,097

403.16 error: “Client certificate is untrusted or invalid”

Nedim on Sep 12 2019 07:49 AM
Browsers show 4xx errors when there is a client side issue while browsing a website. 403 error specifically translates t...
50.5K

IIS and Url-Rewrite: rewriting the outbound response contents

pcociuba on Sep 10 2019 03:06 AM
In this third installment, we will review the configuration of the ReverseProxy rule to allow the correct re-writting of...
92.4K

IIS acting as reverse proxy: Where the problems start

pcociuba on Sep 10 2019 02:12 AM
When setting up a reverse proxy rule with IIS and url-rewrite, you may hit some real world problems when enabling the co...

Latest Comments

manojdixit
in A quick guide to publish Python SDK Azure Bots in App Service on Jun 11 2024 12:38 PM
Thanks Shekhar. We may need to add the gunicorn package to requirements.txt if you see below error: 2024-06-11T00:29:26.983771768Z File "<frozen importlib._bootstrap>", line 1007, in _find_and_load2024-06-11T00:29:26.983776468Z File "<frozen importlib._bootstrap>", line 972, in _find_and_load_unlock...
0 Likes
SouravChakraborty
in Getting better stack traces in Process Monitor / Process Explorer on Jun 10 2024 01:15 AM
Hello Microsoft Team, This article is very helpful in indeed. Although the image files links are broken hence can you please fix this then it would really help us. Thanks in advance.
0 Likes
gerroe
in Certificate is missing in IIS binding window on Jun 04 2024 11:37 AM
I ran into issue with the system not finding the file remove the brackets for the thumbprint and it should work.
0 Likes
kollodziej
in Event ID 5059 (Application pool has been disabled) on Jun 04 2024 08:56 AM
I have checked all points that you have mentioned and my some of my app pools still fails to start after computer restart. Does anyone maybe have the same problem? I have my applicationPoolDefaults -> startMode se to "AlwaysRunning" If I start pools that fails after computer restart manually it work...
0 Likes
liju_pv
in Host Header Vulnerability on May 29 2024 10:26 AM
Hi Nedim,How to Disable support for X-Forwarded-Host as you have suggested above? Thanks!
0 Likes