mod_auth_ldap
Allows an LDAP directory to be used to store the database for HTTP Basic authentication.[1]
Documentation
Examples
- Authorization for the directory /munin
LDAPTrustedMode SSL 
LDAPTrustedGlobalCert CA_BASE64 /etc/cert/myca.crt
<Location "/munin">
   Order Deny,Allow
   Deny from all 
   Allow from 127.0.0.1 10.0.0.0/16
   SSLRequireSSL
   AuthType Basic
   AuthName "Munin"
   AuthBasicProvider ldap
   AuthzLDAPAuthoritative off 
   AuthLDAPURL ldaps://ldap.raysoft.loc/dc=raysoft,dc=loc?uid
   AuthLDAPGroupAttribute memberUid
   AuthLDAPGroupAttributeIsDN off 
   Require ldap-group cn=monitoring,ou=group,dc=raysoft,dc=loc
</Location>