Forms Authentication
Forms authentication, which was available as an add-in option to earlier IIS versions, is now integrated in IIS 7.0. In contrast to the other authentication methods that IIS 7.0 supports, forms authentication lets web-application administrators and developers manage user registration and authentication at the application level, without needing to use the built-in Windows authentication mechanisms and identities.
Forms authentication uses a redirection mechanism to a logon page to determine the user’s identity. When a user connects to a document hosted on a site that’s protected using forms authentication, the user will enter his or her username and password at a logon screen, which then passes the user’s credentials to an authentication and credentials database, such as a Microsoft SQL Server database. The forms-based authentication mechanism then performs some sort of matching process to verify that the entered credentials match what’s in the forms-based authentication credential database. . . .
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