1.3 Overview
The NTLM over HTTP Protocol authentication variant is similar to the SPNEGO HTTP (as specified in [RFC4559]) authentication mechanism. Both are used to authenticate a web client to a web server. Although SPNEGO HTTP (as specified in [RFC4559]) works with both Kerberos and NTLM authentication, the NTLM over HTTP Protocol authentication variant only works with NTLM. The Kerberos protocol is not supported.