Hi, tonight I've tried to move Samba 2.2.3a-15 from our old debian woody machine to a new, different server, which is a ubunut dapper box, running Samba 3.0.22-1ubuntu3. But I get a 'Rejecting auth request from client' error, What I did: 1) copied following files from /etc/samba/ to the new machine: MACHINE.SID smb.conf -> see here: http://129.70.34.180/~schoppa/smb.conf smbpasswd 2) copied users from /etc/passwd and /etc/group to the new machine and created all home directories and shared directories. 3) here is a list of ALL files on the old server in /var/lib/samba/ ntdrivers.tdb ntforms.tdb ntprinters.tdb secrets.tdb share_info.tdb wins.dat Yes, that's the complete list, no "account_policy.tdb" etc. files and I don't know which of these files are needed on the 3.0.22 machine. PROBLEM: when shutting down the old 2.2 Samba Server and starting the new 3.0.22 one with the same IP, netbios name and smb.conf it's possible to join the domain from my client computer (WinXP) with my username (testuser). No problem so far. But, if I go to another client computer - which is part of the same domain - try to log in with the same valid username (testuser), I get the following error (I've logged out on my computer before): --------------- [2006/07/08 00:11:12, 2] lib/access.c:check_access(324) Allowed connection from (192.168.1.27) [2006/07/08 00:11:12, 2] libsmb/credentials.c:creds_server_check(159) creds_server_check: credentials check failed. [2006/07/08 00:11:12, 2] rpc_server/srv_netlog_nt.c:_net_sam_logon(667) _net_sam_logon: creds_server_step failed. Rejecting auth request from client UREW-PCSCHOPPA2 machine account UREW-PCSCHOPPA2$ [2006/07/08 00:11:12, 2] lib/access.c:check_access(324) Allowed connection from (192.168.1.27) [2006/07/08 00:11:12, 2] auth/auth.c:check_ntlm_password(307) check_ntlm_password: authentication for user [testuser] -> [testuser] -> [testuser] succeeded [2006/07/08 00:11:40, 2] smbd/server.c:exit_server(614) --------------- I've tried that on different clients and it's reproducable: You can log into the domain from any client with any user only if the user had been logged into the OLD domain/old samba server from this particular client. Trying to log in with any valid user from a client machine that is registered in the domain but was never used by this user before will give you the above error. I think it has something to do with the machine accounts. Did I forget to copy some files, or is something wrong with my smb.conf? Any ideas? Thank you, Marcus