Apache SPNEGO implementation
Apache SPNEGO refers to implementations or modules within the Apache HTTP Server that support SPNEGO (Simple and Protected GSSAPI Negotiation Mechanism) for authentication. SPNEGO is a standard that is primarily used to negotiate authentication mechanisms such as Kerberos in web environments.
SPNEGO enables secure single sign-on (SSO) by negotiating the authentication protocol between a client (such as a browser) and a server.
For more background information, see Windows Authentication How-To.
 | SPNEGO SSO using Kerberos does not work on localhost. You cannot try out your SSO configuration on the web server. Negotiation will take the unsupported NTLM authentication instead of localhost. |