Create server on Debian 8 https://www.howtoforge.com/debian-squeeze-ldap-server-with-openldap-and-phpldapadmin CentOS 6 or 7 as client http://blog.zwiegnet.com/linux-server/configure-centos-7-ldap-client/ Configuring OpenLDAP as Backend for Samba PDC http://siddou.tk/2013/06/install-sambaopenldap-on-debian-7-wheezy/