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...

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...

  New KB article 2028718  on the block related to  Event ID:1074 and Event ID:1310  while storing session in aspnet_State .. Read More Enjoy!

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...

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...

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...

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...

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...

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...

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...

In general, a 500.19 error happens due to invalid configuration data. The IIS configuration system will almost always point to the source of the problem. At the same time, sometimes it is important to examine the “Error Code” field which symbolizes the...

I recently helped a customer with an issue where ASP pages would not execute and returned the following error page: HTTP Error 500.0 - Internal Server Error If you check the Detailed Error page you will see the following additional information ...

Symptoms So a co-worker of mine was setting up IIS 7.0 on a new Windows 7 machine, and when they were browsing to http://localhost they were getting a 503 Service Unavailable error as shown here: Troubleshooting This seemed pretty trivial...

Microsoft recently released an update for Internet Information Services (IIS), as described in the following article: Description of the update that implements Extended Protection for Authentication in Internet Information Services (IIS) http...

The IIS 7 manager provides a UI for almost all sections for the web.config. It does simplify things for administrators but I have seen a couple of cases where this has lead to interesting problems. Let us consider the Machine Key feature that the IIS...

Web server Administrators have been using the Debug Diagnostic 1.1 to troubleshoot crash\hang issues on IIS 5 and 6. The Debug Diagnostic tool needs no introduction. It is a great tool and it provides you a lot of flexibility in collecting crash dumps...

FTP 7.5 comes with new features like supporting Host headers (Virtual host) and SSL. For compatibility purposes, FTP clients can check whether the FTP server supports host headers by sending a FEAT command to check for supported features. An FTP server...

I recently worked an issue with a customer where we needed to capture a full user dump of the IIS worker process when a specific function was being called. The problem was that the function was in managed code. I thought it would be good to share how...

We've encountered several scenarios in which customers have multiple developers working on a single web application in Visual Studio. In such cases, it's not uncommon for each developer to be working on a portion of the application. There isn't any problem...

In March of this year, we released ASP.NET MVC. Since then, many ASP.NET developers have been perplexed about MVC. Many developers aren't quite sure what MVC is and what it means for ASP.NET developers. Many more developers have some level of understanding...

One of my customers had a problem on his IIS server, where the IIS process hosting his web application was suffering from very high memory utilization over time. Eventually the process got so high in memory that the web application became completely unresponsive...

When there is more than 1 server in web farm scenario it is an obvious choice to go for session out-of-proc either with SQL server or State server. While storing session with SQLServer if you see issues with SQL deadlock during peak loads involving DeleteExpiredSessions...

Procdump is a light weight Sysinternal's command-line utility whose primary purpose is monitoring an application for CPU spikes and generating crash dumps during such spikes which an administrator or developer can use to determine the cause or to share...

In my previous post , I wrote about using FREB to troubleshoot a simple error message to identify the module which sets the error. For this post, let’s assume we are troubleshooting a slow running page (any page, be it aspx, asmx, html, etc). Not...

I had another interesting customer issue this week, where in uploading a file using the FileUpload control was failing only with IE8 . As you would do with any client-side issue, I started by collecting Fiddler traces for both the working (IE7) and non...