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WHAT I WANT: An App running on an IIS Server SQL running on SQLServer

And my user running the site on thier machine and connecting to SQL using their credentials.

WHAT I HAVE SET UP: I have 3 machines 1 running AD (ADMachine), 1 running SQL Server (mySQLSERVER) and one running IIS (MyIIS).

I have a site on IIS running under the Default Website which navigates to http://MySite/MyApp

I have an app pool with a custom identify of MyDomain\MyServiceUser

have set up 2 SPN's using setspn -a HTTP/mySite MyDomain\MyServiceUser setspn -a HTTP/mySite/MyApp MyDomain\MyServiceUser

MY ISSUE: Error: Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON' on the page that connects to SQL

I have set up this test page on my site, and am getting an Authentication Method of Negotiate(NTLM) and not Negotiate(Kerberos) http://blogs.msdn.com/b/friis/archive/2013/01/08/asp-net-authentication-test-page.aspx

To confuse matters even more, Kerberos is correctly used when fiddler is open, and stops being used when fiddler is closed.

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Windows design issue, it's a negotiation issue, you can go for Kerberos only in authentication(and adapt the clients to that) or configure IIS for both. An extensive guide has been published here http://blogs.msdn.com/b/chiranth/archive/2014/04/17/setting-up-kerberos-authentication-for-a-website-in-iis.aspx

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