I'm new to IIS 7.5 and I am trying to get a site working with Windows Authentication. It's an ASP.NET 4.0 application which is set up as an application under the default website and it is running the ASP.NET 4 app pool. The application is set up with Anonymous Authentication disabled and Windows Authentication enabled.
The site is not authenticating properly - I can see an error in the event log (this is a Null Reference error to do with some code that uses Context.User) and the detail says IsAuthenticated=False and the User is blank.
I have set Authentication Mode = Windows under <system.web> in my Web.config and have tried various other config settings without success.
I've tried using the ASP.NET classic app pool but get an error
Handler "ExtensionlessUrl-ISAPI-4.0_64bit" has a bad module"IsapiModule" in its module list
I'd prefer to get it working using the ASP.NET 4 app pool if possible. Can anyone advise what I need to do?