The authentication option for the ASP.NET application is specified by using the tag in the Web.config file, as shown below:
other authentication options
1. WINDOWS AUTHENTICATION Schemes
I. Integrated Windows authentication
II. Basic and basic with SSL authentication
III. Digest authentication
IV. Client Certificate authentication
2. FORMS AUTHENTICATION
You, as a Web application developer, are supposed to develop the Web page and authenticate the user by checking the provided user ID and password against some user database
A centralized service provided by Microsoft, offers a single logon point for clients.
Unauthenticated users are redirected to the Passport site
4 NONE/CUSTOM AUTHENTICATION:
If we don?t want ASP.NET to perform any authentication, we can set the authentication mode to ?none?.
The reason behind this decision could be: We don?t want to authenticate our users, and our Web site is open for all to use. We want to provide our own custom authentication.