Mod_Auth_External is an Apache module used for authentication. The Apache HTTP Daemon can be configured to require users to supply logins and passwords before accessing pages in some directories. Authentication is the process of checking if the password given is correct for a user. Apache has standard modules for authenticating out of several different kinds of databases. Mod_Auth_External is a flexible tool for creating authentication systems based on other databases. WWW: http://www.unixpapa.com/mod_auth_external.html