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Friday, October 23, 2009 1:33 AM

WWW Service not listed in the Services console (IIS 6.0)?

This post is a continuation to the series on IIS service startup issues. I did not feel like writing it since we haven’t seen much cases on this type of behavior and I thought this could be one of those rare issues which always happens with IIS but my
Posted by Saurabh Singh | 0 Comments
Friday, July 03, 2009 2:08 AM

Required permissions when calling a Web service using client certificate for authentication in an ASP.NET Web application

A Web service requiring Client certificate authentication is a common scenario. You may have a client application which needs to send the Client certificate as part of the web request for accessing the web service. This client application may be a Windows/Console
Posted by Saurabh Singh | 7 Comments
Saturday, June 13, 2009 1:05 AM

Avoid this confusion around Client certificate mapping in IIS 6.0/7.0

I just wanted to add this quick post around Client certificate Mapping on IIS. This is focused on 1-to-1/Many-to-1 mapping in IIS 6.0/7.0. If you are interested to know more about configuring Client certificate mapping in IIS 6.0 please check this post
Posted by Saurabh Singh | 0 Comments
Thursday, March 19, 2009 7:33 PM

Asp.Net Request routing implementation fails with Null Reference exception

I recently had the pleasure of working on the implementation of Asp.Net Request Routing feature that comes in bundled with .Net Framework 3.5 SP1. This is a cool stuff wherein care has been taken to ensure it can be used independently of MVC Framework.
Posted by Saurabh Singh | 3 Comments
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Saturday, March 07, 2009 1:15 AM

Some Info around WebDAV content access issues

If you have a Web folder (WebDAV) hosted on IIS using Basic Authentication there are a few things you need to ensure such that any client accessing the resource does not get into failures. If your WebDAV site is restricted using Basic authentication and
Posted by Saurabh Singh | 1 Comments
Tuesday, February 17, 2009 2:43 AM

Increase the concurrent connections limit for IIS FTP site if you see server reset

If you have a FTP site hosted on IIS which receives a burst of client connections at specific intervals and you see the connections getting reset from server-end please read on. Let's say you have over 1500 concurrent FTP client connections being made
Posted by Saurabh Singh | 1 Comments
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Friday, January 30, 2009 7:09 AM

Getting fatal error LNK1181: cannot open input file 'kernel32.lib'

I was a happy man until a few hours back when I was playing with some C, C++ programs built using Visual Studio 2008 on my work and home machines. I could write some program on my workstation, copy the solution to my personal laptop at home and thereby
Posted by Saurabh Singh | 5 Comments
Thursday, December 25, 2008 1:01 AM

Service Principal Name (SPN) checklist for Kerberos authentication with IIS 7.0

In continuation to one of my earlier posts which focused on IIS 6.0 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
Posted by Saurabh Singh | 2 Comments
Friday, November 21, 2008 8:47 PM

FTP changes not taking effect in IIS 7.0?

I was working on an FTP issue the other day on IIS 7.0 and I missed something very basic which could have resolved my issue way back had I noticed the nuances of this new model. Normally people tend to go ahead with restarting IIS services for some changes
Posted by Saurabh Singh | 1 Comments
Sunday, November 16, 2008 10:11 AM

Who knows! You may be missing these points for Kerberos authentication failures for Web applications...

I am sharing here some of the general + elusive + ignored + must-have info that you may want to recheck when you are troubleshooting a kerberos cum delegation failure scenario and feel like reaching nowhere near the end of the tunnel (resolution!). These
Posted by Saurabh Singh | 3 Comments
Saturday, August 30, 2008 5:27 AM

Troubleshooting TS Gateway connectivity on Windows 2008, IIS 7.0

Here is something which is not my domain but had to learn the hard way. I recently encountered an issue while enabling Terminal Services Gateway (TSG) on Windows 2008 server. TSG is coupled with IIS 7.0 hosted on Windows 2k8 server and that's how I came
Posted by Saurabh Singh | 6 Comments
Friday, July 25, 2008 4:09 PM

Some tips if your IIS 6.0 World Wide Web Service (WWW) ever goes down...

Well, every time I try writing some thing different than IIS and for some reason I come back to it :-) Here is a quick troubleshooting tip for a scenario where World Wide Web service on my test IIS 6.0 box went down for no apparent reason. Here is what
Posted by Saurabh Singh | 4 Comments
Tuesday, May 27, 2008 1:05 AM

SSL Troubleshooting for IIS Web Sites contd...

Recently a colleague of mine was working on a customer's case which was a Critical level incident. High pressure job, huhh! The issue was with SSL not working for one of their web sites. They were seeing "Page cannot be displayed" when trying to access
Posted by Saurabh Singh | 12 Comments
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Thursday, April 03, 2008 12:10 AM

Unable to access IIsCertMapper object through ADSI

Today, I was working on an issue where we were trying to add mapping for client certificate for a windows account using ADSI and VBScript. Something similar as below: <% Dim CertObj, vCert vCert = Request.ClientCertificate("CERTIFICATE") Set CertObj
Posted by Saurabh Singh | 7 Comments
Wednesday, November 07, 2007 10:39 PM

You get a Security Alert when you try to access an SSL enabled web site when certificate has been issued by an internal root CA...

Let's say you have your own internal Root Certificate Authority (CA) and you use it to grant server certificates to your Web sites. You are able to browse to your web site over SSL and can access the page. Things look good so far. However you get an unwanted
Posted by Saurabh Singh | 7 Comments
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