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  • Do IISReset after disabling Kernel-mode authentication

    When you disable the kernel-mode authentication option in IIS 7, make sure you will do an IISReset. Recycling the app pool is not enough. I was doing some debugging/testing with a WCF service using basicHttpBinding with a TransportCredentialOnly security mode and delegation scenario's. At some point...
    Posted to Michel Barneveld's Blog by Michel Barneveld on 05-09-2012
    Filed under: Kerberos, IIS, Wcf
  • Kerberos Authentication Tester

    Quite often I am wondering if a site is using Kerberos or NTLM. You can use tools like Fiddler, Network Monitor and such for that. But sometimes I just want to have a simple tool without installation like when working on computers where you can't install such software but are allowed to run executables...
    Posted to Michel Barneveld's Blog by Michel Barneveld on 12-05-2009
    Filed under: Kerberos, Security, Tools
  • Kerberos Authentication Tester v0.9.3 (beta)

    This is a tool to test Authentication on websites. It will show what authentication type is used: Kerberos, NTLM, basic, none. But it also shows other information like: SPN used, HTTP headers, decrypted NTLM and Kerberos authorization headers. And it can also show and delete your Kerberos Tickets. See...
    Posted to Tools by Michel Barneveld on 12-03-2009
    Filed under: Kerberos, tools
  • Kernel-mode authentication performance benefits

    2 Weeks ago I wrote a post about kernel-mode authentication and SharePoint 2010 . One of my questions was: What is the performance benefit of using kernel-mode authentication? I did some testing last week and now I had time to analyze the results and create some graphs out of those results. The test...
    Posted to Michel Barneveld's Blog by Michel Barneveld on 12-02-2009
    Filed under: Kerberos, Windows, IIS
  • SharePoint 2010 and Kernel-mode Authentication

    Note: This was written when the beta of SharePoint 2010 came out. It's now known that this configuration is not supported by Microsoft! I was wondering what authentication settings SharePoint 2010 will use when creating a new Web Application. Because Windows Server 2008 introduced Kernel-mode Authentication...
    Posted to Michel Barneveld's Blog by Michel Barneveld on 11-16-2009
    Filed under: 2010, SharePoint, Kerberos, Security, Windows, IIS
  • The reason why KB911149 and KB908209 are not the solution!

    "Do not use CNAME dns records and non default web ports when using Kerberos!" The last 2 years I have done quite some Kerberos review and troubleshooting sessions (usually in combination with SharePoint) for big customers of Imtech but also for some Microsoft customers. And quite often I tell...
    Posted to Michel Barneveld's Blog by Michel Barneveld on 11-14-2009
    Filed under: SharePoint, Kerberos, CNAME, .Net Framework
  • Login failed. (Microsoft SQL Server, Error: 18452)

    Today I created a new virtual machine to do some SharePoint 2010 testing. First installed Windows 2008 R2, then added and configured the DNS and Active Directory roles. Installed Sql Server 2008 R2. Started the install of SharePoint 2010. Untill this point everything went very smooth. But during the...
    Posted to Michel Barneveld's Blog by Michel Barneveld on 11-11-2009
    Filed under: Kerberos, Error, SQL Server
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