Apache and ldap authentication

The project at hand: Setup an LDAP directory that will work with Apache2 using basic auth. In other words, I want to protect Apache directories by forcing users to enter a username/password (using http basic auth) and have the username and password checked against an ldap server.

Reference:

Authenticationg Cacti Version 0.8.7b on OpenLDAP

I've been looking a method to authenticate Cacti on OpenLDAP, so here's how i do it : 

• go to configuration,settings, authentication 
• authentication method : ldap authentication 
• guest user : no user 
• user template : no user 
• ldap settings, server: address ldap server or fqdn
• port standard : 389
• port ssl : 636
• protocol version : 3
• encryption : none 
• referrals : none