This is more than likely a rookie config problem but when I try to add the server to the ADS domain with: $net ads join I get: [*DATESTAMP*] libads/kerberos.c:get_service_tickets(335) get_service_ticket: kerberos_kinit_password SERVER$MY.DOMAIN.COM@MY.DOMAIN.COM failed: Preauthentication failed Segmentation fault Redhat ES 3. samba-3.0.10 my /etc/krb5.conf was taken from another machine that it works on.. same os.. same samba level...