使用SQL Server中的配置文件对Active Directory进行ASP.NET MVC和WCF身份验证/授权

I have an intranet application, which can also be accessed from internet by clients. What I need to do is provide users that access it from the internet a login form to enter credentials and validate them against AD. Users that access this app from intranet should be logged in automatically.I have an intranet application, which can also