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  • Blog Post: You may see your IIS 6.0 applications failing to respond after you install Microsoft update KB 982666

    We are recently seeing lot many support cases coming our way. If you are seeing the following after installing the Microsoft update KB 982666 on a Windows Server 2003 machine: IIS application pools or websites no longer starts. IIS web-sites may not be able to start. Rapid Fail Protection shuts down...
  • Blog Post: 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 customer who bore the brunt of trying to reinstall...
  • Blog Post: Automate client certificate one-to-one mapping in IIS 6.0 using C#

    In PSS, we occasionally get requests from our customers wherein they want to automatically add entries for client certificate mapping in IIS or Active Directory (AD). That is either a 1-to-1, Many-to-1 or AD mapping for the client certificate authentication for the web site. I recommend going with AD...
  • Blog Post: 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 at every 'n' minute you may see that the IIS FTP...
  • Blog Post: 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 are my personal checklists based on experiences...
  • Blog Post: My IIS 6.0 Mobile Manager - Manage your Web Sites, application Pools through mobile device from anywhere...

    In May this year I had written a Web application using which we can manage basic IIS settings through Web browser from anywhere. Here is another application which I feel brings in more convenience to the end user (meant for Web administrators) since one can manage IIS through a Mobile phone. These are...
  • Blog Post: 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 I started seeing when we tried to start all IIS...
  • Blog Post: My IIS 6.0 Web Manager - Manage your Web Sites, Application Pools from any where on the Web.

    A Web administrator has to have access to the IIS server in order to ensure that any diagnostic/preventive measures can be performed at any point of time. One has to ensure all the web sites are running up and fine during the course of a day. Activities like recycling Application pools, starting/stopping...
  • Blog Post: Change in IIS MMC setting may cause unwanted restarts of W3SVC

    Recently we have discovered an issue with IIS Manager wherein changing settings in a certain way may cause unexpected restart of World wide Web Publishing Service. And this may happen before you realize until you go back to the Application event log and find entries corresponding to the W3SVC restart...
  • Blog Post: 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 = GetObject("IIS://<path>/IIsCertMapper")...
  • Blog Post: Enabling Active Directory Isolation mode for FTP to work for trusted domain users

    Let's consider a scenario wherein we have an FTP site hosted on an IIS Server and we are trying to setup the site to work in Active Directory (AD) Isolation mode. Now things should work just fine if we have the setup done properly. I have talked about general setup and common issues with FTP sites here...
  • Blog Post: HTTP to HTTPS (SSL) Web Request Redirection

    We often get requests from our customers asking how they can seamlessly redirect web requests from HTTP to HTTPS, i.e. how they can redirect a non-SSL request to an SSL based request. Recently a colleague of mine got a similar issue and we decided to use some existing scripts that we had in our database...
  • Blog Post: Wildcard SSL certificate in IIS 6.0, Windows 2003 Sp1 and above

    Here I will be talking about configuring SSL wildcard certificates in IIS 6.0 on Win2k3 SP1 and above. You may have a scenario wherein you want to have the same certificate installed for multiple Websites. Now in a normal scenarios this is not possible. What I mean is you cannot have the same certificate...
  • Blog Post: Troubleshooting FTP related issues on IIS 6.0

    Troubleshooting FTP related issues on IIS can be a real pain. If you have not encountered so far you are lucky:-) What I do generally is to create a new FTP site and make it to work rather than working on the already corrupted site. It depends on your personal choice depending upon how much you want...
  • Blog Post: Troubleshooting SSL related issues with IIS

    In this post I am going to discuss troubleshooting SSL server certificate related issues in IIS. Please remember I am no SSL expert...I am an IIS Asp.Net guy and will discuss issues with regard to SSL with IIS. We have seen a lot many times that the issues could have been resolved by our customers...
  • Blog Post: IIS ADMIN service fail to start?

    An issue that causes a lot of headache to Web Admins is when IISADMIN service does not start up for no reason. Here are a quick troubleshooting steps you can do before you look around and yell for help or call into Microsoft Product Support services and shell out some $$. -- Check and Make sure...
  • Blog Post: Troubleshooting Anonymous authentication failures in IIS

    Recently I was checking MSDN and KBs for a quick check on troubleshooting anonymous authentication, and sadly I could not find a single article devoted to it (that's strictly my personal experience). We often get calls on issues related to Anonymous authentication failures and this is something which...
  • Blog Post: How to setup IIS and AD for Client certificate authentication

    Hi All, This post talks about how Client certificates are configured on websites. I have seen a lot of incidents where people get into issues with client certificate in particular, although server (website) certificates can give a scare at times. Here I will be walking you through the steps of configuring...
  • Blog Post: Kerberos troubleshooting from IIS perspective

    Hi All, This is my first posting in the blog. I really had to take enough courage to start blogging, but with some help from one of my mentors in MS, I am finally here. I hope people really get benefitted from the articles that I post in here. Today, I am going to talk about how to implement...
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