[CentOS] LDAP authentication on a remote server (via ldaps://) [SOLVED]

> You can also use StartTLS over the network and LDAPI (connection over Unix
> sockets, which are inherently secure) for apps running on the server. I use
> it, both with OpenLDAP and 389 Directory Server (a.k.a. Fedora DS, Red Hat
> DS).

Unfortunately, I have a whole LAN whose user/group/auth management is
centralized with LDAP (each server having different apps).
So I need plain LDAP access on the LAN.