Apache HTTP Server Version 2.2. ... The module mod_authz_host provides authorization and access control based on hostname, ... Because of the way that Basic authentication is specified ...

The team proposed a linkable and traceable anonymous authentication with fine-grained access control, supporting access control, anonymity, public linkability and public traceability at the same time.

The module mod_authz_host provides authorization and access control based on hostname, IP address or characteristics of the request, but is not part of the authentication provider system.