Admin Tool Radius
This $2.50 (Aus) tool from the app store will help you to configure RADIUS (technically FreeRADIUS) that is included with Server.app for Yosemite. RADIUS, just like LDAP, is an open standard for authenticating users to a central database. You could potentially make your WiFi much more secure by implementing 802.11x which leverages RADIUS to auth back to your directory server.