I have a samba PDC on redhat 9. Linux systems join the domain served by the PDC without problem. Windwos 2k systems cannot joint the domain. The message is: *****************************************************************8 The following error occurred validating the name "<domain name>". This condition may be caused by a DNS lookup problem. For more information about troubleshooting common DNS lookup problems, see the following Microsoft website Http://go.microsoft.com/fwlink/?LinkID=5171 The specified domain either does not exist or could not be contacted. ******************************************************************* I have the PDC acting as a wins server and have entered the ip address the the PDC into the wins configuration box on the windows 2k system. Windows 2k pings the linux server fine and I can connected to the linux PDC from windows in a broswer if I type in the IP address and provide a valid username and password. I have successfully established PDC's in the past with W2k and as far as I can tell, I have followed the same procedure here. Sometimes a logfile is generated in /var/log/samba/windows.log after an attempt to join the domain, and sometime not. Thanks in advance.