Hello I install Samba 4.0.0 alpha 12 on Ubuntu 9.10 and configured as PDC. When I want join windows to domain I get error message: It?s unable to communicate with domain controller for domain firma.local. Query DNS resource record for the service location (SRV) used to locate a domain controller for domain firma.local was successful. The query was for the SRV record for _ldap._tcp.dc._msdcs.firma.local The query identified the following domain controllers: Przemek-laptop.firma.local The most common causes of this error are: - host (A) records that map the name of the domain controller to IP addresses are missing or contain incorrect addresses. - Domain controllers registered in DNS are not connected to the network or do not work. In smb.conf file netbios name is ?PRZEMEK-LAPTOP?. In captured packet in line 6 on the CLDAP packet from server to client http://www.psalask.cba.pl/foto1.jpg I saw that NetBios Hostname is ?\\PRZEMEK-LAPTOP? http://www.psalask.cba.pl/foto2.jpg . NetBios Hostname is taken by LDAP from smb.conf because when I change netbios name on this file, CLDAP packet is changing to. I include captured packet from attempt to connect to domain on Samba 4 www.psalask.cba.pl/packet_samba4.pcap <http://www.psalask.cba.pl/packet_samba4.pcap> To compare I include captured packets from connection to the same domain on Active Directory in Windows 2003 http://psalask.cba.pl/packets_AD_windows2003.pcap My question is: How can I remove ?\\? from NetBios Hostname on CLDAP packet? Thanks -- Pozdrawiam Przemys?aw Jagie?a