WebTopics

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...

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...

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://...

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...

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...

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...

One of my customers ran into this issue couple of months ago. I wanted to blog it earlier but I was waiting for the Fix to come out. The typical scenario is - you are using the System.Web.RoleManager of .NET Framework 2.0 along with Ajax Extensions. When...

This week I got an interesting issue altogether. One of my customers was unable to turn off the CustomErrors at all. We checked all the web.config files in hierarchy including the web.config and machine.config in C:\WINNT\Microsoft.NET\Framework\v2.0...

Few days’ back one funny issue came to me.   All of a sudden on one of the Windows 2003 server my customer was getting “HTTP/1.1 500 Server Error” for any .asp pages in the application. It stopped working since last couple days and used to work earlier...

This a bit of a tricky thing. We all know the famous KB for “How to turn on remote debugging in Windows XP with Service Pack 2, in Windows Server 2003 Service Pack 1, or in Windows Vista” and we do all these settings on the Vista box to turn on debugging...

Many times we need pop-up windows to appear in our Web Applications. In such a scenario we have the same user session used by the two instances of the web browser. So for N number of pop-ups we open, we have N instances of browsers using the same user...

Introduction:   This is the first post of mine so thought of starting with a simple but tricky issue which I came across in few support incidents I have handled. I had a scenario where one of my customers was getting an error message like - Invalid...

Most people on installing .NET 3.5 on the server "expect" an entry for  v3.5 under the ASP.NET version Tab in IIS manager. And not finding that entry start panicking. If you have been one of those read on. The more tech savvy folks try...

After sending an HTTP request to an IIS server, an HTTP client (such as Internet Explorer) may display the following type of error message in the browser window: If Internet Explorer’s Friendly HTTP Error Messages option is turned off,...

I really enjoy working on a good SSL issue.  The technologies are mature and well documented and work the same in most places so the issues are generally straightforward.  There are exceptions of course and they can get hairy. Normally the biggest...

The maximum number of Application Pools that IIS 6 can host depends on a few different things, including (but not necessarily restricted to) the type(s) of content being served, the number of application pool running concurrently, and the identities of...

This post is more about the confusion that may arise around SPNs for setting up Kerberos authentication in IIS 7.0. IIS 7.0 has a new Kernel-mode authentication feature using which the ticket for the requested service is decrypted using Machine account...

We’ve seen a few instances of the following error message on 64 bit servers when IIS 7.0 is attempting to process a pending certificate request: Complete Certificate Request There was an error while performing this operation. Details: CertEnroll...

Introduction The purpose of this blog post is to discuss how to mask an IIS server’s IP address from being sent as part of an HTTP response. By default, IIS can send a server’s IP address in the Content-Location or Location response headers of a response...

If you are a Server Core fan, and wished you could host ASP.NET websites in Server Core, then feel better, you wish had come true. Windows Server 2008 R2’s Server Core will have .NET Framework which means, ASP.NET too. This is a big news for all those...

Questions often arise pertaining to what the Time-Taken and Time fields are reporting in the IIS logs. The Time field is quite straightforward: it specifies when the log entry was created. Note that this is not always the same as when the log entry...

The purpose of this blog post is to review the concept of SQL Injection attacks, to introduce URLScan 3.0, and to discuss how to configure URLScan 3.0 to block a SQL Injection attack that uses the Cookie header of an HTTP request as its attack vector...

Special thanks to Sean Everhart for contributing this topic Internet Explorer 8.0 introduces a new method of interpreting and displaying the HTML data sent from web servers. In some cases, this can result in the web pages being displayed to users...

As explained in the white paper on IIS and remote storage, IIS 6.0 offers two methods of file caching which need to be considered when configuring your server to host remote content. The two methods are on-demand polling based (using the content file...

Little back I wrote a sweet little IIS7 UI module for taking backup and restore of IIS configuration. At that time I didn’t add the shared host configuration since it was in its early stage, and to be honest I didn’t think about it when wrote that module...