[Samba] PDC: "The trust relationship ... failed" from the beginning

[Eimac Dude]

Hi,

When I try a net logon from Windows 7 64-bit Business (don't have any 
other Windows machines), I get "The trust relationship between this 
workstation and the primary domain failed". The discussion I've found 
around the Web regarding this error message seems to be only in the 
context of the 30 day password expiry issue, where the solution is to 
simply rejoin the domain. Unfortunately, I have this problem *always*, 
and rejoining does not help. I have not been able to do a net login at 
all, from the first time I tried. At the same time, there's no problem 
accessing the Samba shares by going to \\SMB in Windows Explorer and 
logging in with the same user accounts.

# smbstatus
Samba version 3.6.7-48.12.1-2831-SUSE-SL12.2-x86_64

The LAN is on 172.16. and the Samba machine is also the LAN's DNS 
server; not using LDAP.

We had been using Samba for simple file sharing, with no domain 
functionality enabled, and with the Windows machines on the network 
configured as members of the workgroup. We recently decided to set Samba 
as a PDC and support roaming profiles, and have been blocked by this 
trust error.

I made some changes to smb.conf, which can be seen here: 
http://pastebin.com/raw.php?i=qKvQq3W2

The profiles directory was chmod 2775 and its group changed from root to 
users. The netlogon directory is 755. Initially, in smb.conf the name 
resolve order was starting with dns, but Windows 7 kept giving me an 
error about not finding the domain when I tried to change from workgroup 
to domain, so I took that out and set wins as the first item in the list.

# cat /etc/samba/smbusers:
root = administrator Administrator admin
nobody = guest pcguest smbguest

I added root to smbpasswd. I also executed the following:

net groupmap add ntgroup="Domain Admins" unixgroup=root rid=512 type=d
net groupmap add ntgroup="Domain Users"  unixgroup=users rid=513 type=d
net groupmap add ntgroup="Domain Guests" unixgroup=nobody rid=514 type=d
net rpc rights grant -U root "URBASE\Domain Admins" 
SeMachineAccountPrivilege SePrintOperatorPrivilege SeAddUsersPrivilege 
SeDiskOperatorPrivilege SeRemoteShutdownPrivilege

The Windows machines are configured as specified on 
wiki.samba.org/index.php/Windows7 (that is, I only edited 
DomainCompatibilityMode and DNSNameResolutionRequired). Changing from 
workgroup to domain and rebooting, then trying to log in with one of the 
SMB users gives me the "The trust relationship between this workstation 
and the primary domain failed" error. I can only log into the local 
machine account. If, instead of changing from workgroup to domain 
directly, I try to use the network ID wizard, it eventually leads to the 
same error when it tries to set up the domain user. Looking at 
/etc/samba/smbpasswd, the machine account shows up there so the add 
machine script seems to be working; however,

# tail /var/log/samba/log.smbd
[2013/01/23 14:26:16.350332, 0] 
rpc_server/netlogon/srv_netlog_nt.c:976(_netr_ServerAuthenticate3)
_netr_ServerAuthenticate3: netlogon_creds_server_check failed. Rejecting 
auth request from client BRIX machine account BRIX$
[2013/01/23 14:26:16.352562, 0] 
rpc_server/netlogon/srv_netlog_nt.c:976(_netr_ServerAuthenticate3)
_netr_ServerAuthenticate3: netlogon_creds_server_check failed. Rejecting 
auth request from client BRIX machine account BRIX$
[2013/01/23 14:37:22.518159, 0] 
rpc_server/netlogon/srv_netlog_nt.c:976(_netr_ServerAuthenticate3)
_netr_ServerAuthenticate3: netlogon_creds_server_check failed. Rejecting 
auth request from client BRIX machine account BRIX$

Why is it not working? I don't know how to troubleshoot this. I've tried 
removing the machine from the domain then taking it out of smbpasswd and 
the Unix accounts, and then rejoining, but same errors. I tried manually 
adding the IP address in the Windows machine's WINS setting, but it 
doesn't make a difference.

One thing I'm unsure of is the DNS suffixes thing which seems to be 
mentioned on some sites in association with this. In the Windows 
clients, under "Append these DNS suffixes (in order)" we've normally had 
as suffix the DNS master zone for the LAN, which is different from the 
domain name in smb.conf -- if that matters at all given joining the 
domain should be using WINS instead of DNS for name resolution. I tried 
adding the domain in there anyway, but it doesn't help.

Can anyone kindly help? I've asked on a couple of other forums but to no 
avail...