IIS 7.0 Authentication Methods Like its predecessors, IIS 7.0 supports the classic HTTP authentication protocols (basic and digest authentication), the typical Windows authentication protocols (NTLM and Kerberos), and client certificate–based authentication. Another long-standing authentication option that’s still around in IIS 7.0 is anonymous or unauthenticated access.
New in IIS 7.0 is support for a logon redirection–based authentication method called forms authentication. Also, in IIS 7.0 Microsoft removed the support for Microsoft Passport–based authentication. Passport, the former Microsoft cookie-based web single sign-on (SSO) solution for MSN and related Microsoft and partner websites, is the predecessor to Windows Live ID, the new Microsoft Web SSO solution for Windows Live and related websites (which IIS 7.0 doesn’t support, either).
A significant change in IIS 7.0 is that these authentication