Hi all I have two freeradius servers with ntlm_auth and local auth The point is that sometimes ntlm_auth stops to work on the primary server. When I test it from the command line with command /usr/bin/ntlm_auth.... , it says "No logon servers" I noticed in the logs that there were 10 attempts per minute with wrong password from one of our routers. When I applied ACL on the router to block this attempts, ntlm_auth started to work During this time standby radius with its ntlm_auth was able to communicate with AD So the question is if there are some restrictions in samba ( winbind ) when it will stop to communicate with AD in some special cases ? It happened few times with the same scenario I'm using samba3x-3.5.4-0.70.el5 Thanks pet