Hi every body: I need to authenticate in a domain using java. But I don't have any idea to do this. I need help, please. I try to do this using this article: http://forum.java.sun.com/thread.jspa?threadID=726601&tstart=105 but I couldn't get any result, only this error: Naming exception javax.naming.CommunicationException: cenatav.co.cu:389 [Root exception is java.net.ConnectException: Connection timed out: connect] Exception in thread "main" java.lang.NullPointerException at cu.co.cenatav.utils.ldapfastbind.Authenticate(ldapfastbind.java:53) at cu.co.cenatav.utils.fastbindclient.main(fastbindclient.java:19) Could you help me please. Thank   More>>