frankkoenen

This plugin will enable WP authentication and role management from LDAP server. 
Users who log in to your WP site are authenticated by first matching the 
username input against an attribute to local the RDN. Then a bind is performed 
against the RDN. Upon successful bind, authentication is approved. Local WP 
user management is engaged by initializing and maintaining user DB records.
Simply create your users in your LDAP directly. Define access rights or “roles” 
to specific WP sites. When the user logs into the WP site, the local DB user 
entry is created.
Use LDAP to define users in one place for access to one or many WP sites.
User passwords in the local DB are replaced with jumbled text and are unusable. 
All password information is maintained in LDAP.
User information ( Display Name, Nick Name, Nice Name, First Name, Last Name ) 
are maintained in master form in LDAP and stored and updated (synced) to the 
local DB when the user logs in.
<h3>Features</h3>
<ul>
<li>Supports OpenLDAP</li>
<li>Supports TLS</li>
<li>syslog debugging</li>
<li>Centralized roles management.</li>
<li>Password expirary management.</li>
<li>Password reset management in user profile.</li>
<li>Works with WP Multi-Site setup.</li>
</ul>
<h3>Architecture</h3>
Simple LDAP adds an authentication filter to WordPress that authentication requests must pass. 
Consults LDAP for current role configuration.

Plugin Name: ldap_login_password_and_role_manager

Enables LDAP for user authentication, password management and role management.

qoelhex

Just LDAP auth, no other features. A minimalistic approach to auth when you need just auth and no other hassles with it.

Plugin Name: ldap_login_password_and_role_manager vs HELLDAP