IIS 6 applications may stop responding after you install Microsoft update KB 982666

In the last few days we have started seeing a new symptom appearing more and more often on IIS 6 servers. Here are the symptoms: You are running Windows 2003 Server and you have IIS 6 installed and hosting your web-sites. The operating system prompts you to install Microsoft update MS10-040 (KB 982666). After completing…

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MSDeploy – Changing the ConnectionString parameter in web.config after deploying the package

MSDeploy gives you a lot of awesome deployment options. I’m going to illustrate one of these awesome options below by showing how to add a custom parameter to the package created within the IIS manager. It is common for a developer to export the package from his development machine, and deploy it to the production…


Visual Studio 2010 – My Favorite Features

Finally it’s out with loads of new features. I just love the way it looks. Here are some of the cool features I like most: Start Page Visual Studio shell has been completely rewritten in WPF. Start Page is also rewritten using XAML and it provides ways to customize. Here is the link about the…

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System.TypeLoadException for System.ServiceModel.Activation.HttpModule in ASP.NET 4

Symptoms Getting the below error while browsing the website running on ASP.NET 4 application pool. Server Error in ‘/myVDir’ Application. ——————————————————————————– Could not load type ‘System.ServiceModel.Activation.HttpModule’ from assembly ‘System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089’. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the…


Configuring Many-to-One Client Certificate Mappings for IIS 7/7.5

Many-to-one Client certificate mapping is used by the Internet Information Services (IIS) to associate an end user to a windows account when the client certificate is used for the user authentication. The user session is executed under the context of this mapped windows account by IIS. For this to work we need to ensure that…

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IIS 6.0 Installation/Setup failure with the error 0x80090010 (Access denied)

Symptoms During the installation of IIS 6.0 on Windows Server 2003, the setup may throw a message box indicating the following: Error writing encrypted data to the Web Server’s configuration database (Metabase). 0x80090010=Access denied. Below is the screenshot of the exact error. Cause This issue occurs as the Sysocmgr.exe (The EXE for installing Windows components…

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!address -summary explained

In order to debug any high memory issue we rely heavily on the output of !address –summary command [You’ll find !address –summary as the part of Ext.dll extension]. We can interpret quite a few things from it which can help us in further debugging. Here’s how For example (for  32 bit app) 0:027> !address –summary…

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Unexpected 401.1 error over Windows Integrated Authentication on IIS 7.5 website

Symptoms You have an IIS 7.5 server hosted on Windows Server 2008 R2/Windows 7 and when you try to browse to the site over Windows Integrated authentication it fails with 401.1 like below: Module WindowsAuthenticationModule Notification AuthenticateRequest Handler StaticFile Error Code 0x80090305 [Adding the above details in text to allow it to be searched on…

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IIS 7.5 – How to enable IIS Configuration Auditing?

This post briefly discusses the new configuration auditing functionality to trace the changes done to the IIS configuration store. This is similar to the Metabase Auditing which was available in IIS 6.0 with SP1 on Windows 2003 Server; you can refer this KB article which talks about enabling metabase auditing on IIS 6.0 (with SP1)….