[Samba] creds_server_check: credentials check failed on Win7-32bit and samba-3.0.28a on ubuntu-8.04.4

Bob Tanner tanner at real-time.com
Thu Jan 13 01:39:02 MST 2011

Windows 7 Professional 32-bit
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion: 7600

Ubuntu-8.04.4 LTS

I applied the Registry settings as documented at 

            DWORD  DomainCompatibilityMode = 1
            DWORD  DNSNameResolutionRequired = 0

Attempting to logon to PC28 with any domain\username samba logs these errors:

[2011/01/12 22:57:39, 2] libsmb/credentials.c:creds_server_check(220)
  creds_server_check: credentials check failed.

[2011/01/12 22:57:39, 0] rpc_server/srv_netlog_nt.c:_net_auth_2(478)
  _net_auth2: creds_server_check failed. Rejecting auth request from 
client PC28 machine account PC28$

I found this thread 
http://lists.samba.org/archive/samba/2006-January/116053.html seem to 
be the problem I have there's a follow up at 
http://lists.samba.org/archive/samba/2006-January/116095.html but no 

PC28 join the domained with no problems, just the specified warning as 
documented at

I have other Win7 32-bit and Win7 64-bit system authenticating to this 
server with no problems.

testparam is clean

The Samba Checklist at (http://bit.ly/gCBS3G) shows

nmblookup -B SERVER __SAMBA__ ok

nmblookup -B '*'
added interface ip= bcast= nmask=
Socket opened.
querying * on
name_query failed to find name *

The nmblookup -B tells me something wrong with PC28, but what?

net view \\SERVER on PC28 gives me a list of shares

Any help would be appreciated.

Thank you.

Bob Tanner <tanner at real-time.com>                  | Phone : (952 943-8700
http://www.real-time.com, Linux, OSX, VMware | Fax   : (952)943-8500
Key fingerprint = F785 DDFC CF94 7CE8 AA87 3A9D 3895 26F1 0DDB E378

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