This module provides the mod_auth_basic authentication front-end a way to authenticate users by checking credentials via the Cyrus SASL library. . Username and password are checked against the SASL password checking backends, kerberos5, pam, rimap, shadow and ldap are some of the supported mechanisms. . One of the interesting parts of using a SASL backend is that you do not need to elevate Apache HTTPD's access rights to superuser privileges, even when validating through shadow database.