mod_authn_default
Authentication fallback module
Base
mod_authn_default.c
authn_default_module
Available in Apache 2.1 and later

This module is designed to be the fallback module, if you don't have configured an authentication module like mod_auth_basic. It simply rejects any credentials supplied by the user.

AuthDefaultAuthoritative
Sets whether authentication is passed to lower level modules
AuthDefaultAuthoritative On|Off
AuthDefaultAuthoritative On
directory
.htaccess
AuthConfig

Setting the AuthDefaultAuthoritative directive explicitly to `Off` allows for authentication to be passed on to lower level modules (as defined in the `modules.c` files).

# Note

Normally there are no lower level modules, since mod_authn_default is defined to be already on a very low level. Therefore you should leave the value of AuthDefaultAuthoritative as default (`On`).