Microsoft Support Team's IIS Blog Posts

Troubleshooting HTTP Compression in IIS 6.0

Cross-posted from http://blogs.msdn.com/mike Enabling HTTP Compression for your IIS6 web applications is one way of increasing site performance. One of the more common problems I see when helping customers with compression is that their IIS servers are...

Internet Explorer resets the TCP connection after receiving an HTTP response from IIS

A problem was seen where Internet Explorer clients would reset the TCP connection between them and the IIS server when they received an HTTP 200 response for static content from IIS. The problem manifests itself to end users as slow performance of the...

HTTP 400 Bad Request when client terminates request headers improperly

After sending an HTTP request to IIS, an Internet Explorer client displayed the following error message to the user: Bad Request Beginning in IIS 6.0, “Bad Request” errors are almost always returned by HTTP.sys, so the next step was to look in the httperr...

HTTP 400 Bad Request when client sends invalid HTTP:Host header value

In this scenario, HTTP requests were being sent from a non-Windows machine and were being responded to with a “Bad Request – Invalid Hostname” error by the IIS server. Beginning in IIS 6.0, “Bad Request” errors are almost always returned by HTTP.sys,...

SCCM 2007 Charting functionality does not work on 64 bit IIS

System Center Configuration Manager (SCCM) has a nice functionality of displaying report data as charts.  When deployed on a 64 bit IIS 6.0 machine these chart displays may stop working and you will start getting the following error message. This...

ASP.net Hang in IIS 7.0

When hosting an ASP.net web application on IIS7, and you have the application running in integrated pipeline mode, you may find that users complain that the application performs slowly. This may occur if your website is busy, handling 12 or more requests...

WebBaseEvent.Raise method fails in Application_Start event with a NullReferenceException on IIS 7.0

If you implement custom health monitoring events in ASP.NET chances are that you should have worked with WebBaseEvent or WebErrorEvent classes and used the WebBaseEvent.Raise() method to fire those events. Recently an interesting issue related to this...

Metabase auditing on IIS 7.5 [BETA]

Metabase auditing is a very useful feature which allows us to track changes that are made to the IIS metabase. It was introduced with SP1 on Windows 2003 (IIS 6.0). When enabled information such as time and user account that made the change to the metabase...

Report Viewer Toolbar does not render properly on IIS 7.0

I was recently working on a reporting web application that uses the Report Viewer ( ReportViewer ) control that ships with SQL Server Reporting Services (SSRS). The Report Viewer control was rendering perfectly when I was developing using Visual Studio...

SSL stops working in IIS7

Thanks to Robert Patrick for submitting these issues There have been some issues recently where users complain of SSL connections suddenly no longer working with IIS7. Users can connect to IIS7 websites over http://, but browsing to https:// fails with...

<location> Tag Causes Local Automatic ASP.NET debugging not to work in Visual Studio

This week I got an interesting issue altogether. One of my customers was unable to debug ASP.NET 3.5 application locally using Visual Studio 2008. The application was created using Web Application Project. When we started the application using "Start...

Issue with publishing web-site as non-updatable with "Use Fixed Naming and Single Page Assembly" and assembly versioning

Few days back I came across an issue with Publish Web Site and assembly versioning. One of my customers was trying to publish a web site as non-updatable with "Use Fixed Naming and Single Page Assembly" option. Also at the same time they are...

Issue with ActiveDirectoryMembershipProvider and account lock policy

Recently I was working on issue with ActiveDirectoryMembershipProvider of ASP.NET 2.0 and I came across interesting finding which I thought of sharing.   The scenario which I had was a little tricky. One of my customers was using ActiveDirectoryMembershipProvider...

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