Required Settings for Samba NT4 Domains

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Revision as of 21:40, 4 June 2012 by S1037989 (talk | contribs)

Samba versions supporting Windows7 Domain Logon

Support for Windows 7 and Windows Server 2008 R2 using Samba Domain Controllers has been added to the following versions:

  • Samba 3.4 or later
  • Samba 3.3.5 or later
  • Samba 3.3.2, 3.3.3 and 3.3.4 (with NOTES)
  • Samba 3.2.12 or later

We successfully tested Windows 7 Ultimate (Build 2600) with Samba 3.4.0, Samba 3.3.7, Samba 3.3.5, Samba 3.3.2, Samba 3.2.15, Samba 3.2.12 and other versions. Also tested Windows Server 2008 R2 Enterprise with Samba 3.5.6.

If you use older versions, Windows 7 box still can join the Samba Domain but after rebooting, you will receive an error message: "the trust relation between this workstation and the primary domain failed" and no one can logon as any domain user.

-- Monyo 16:22, 5 June 2011 (UTC)

Windows 7 Registry settings

There are currently two registry settings required to be added on the Windows 7 client prior to joining a Samba Domain. These are:

            DWORD  DomainCompatibilityMode = 1
            DWORD  DNSNameResolutionRequired = 0

Samba also ships with a registry patchfile that users can apply directly. The patchfile can be found in recent Samba sourcecode: $SOURCE/docs-xml/registry/Win7_Samba3DomainMember.reg or in Samba Bugzilla here:

Make sure to either reboot Windows 7 or restart the LanmanWorkstation service after setting these entries.

Do not edit any other registry parameters (NETLOGON) that have been seen in the wild. If you have already modified your Windows 7 registry, please make sure to reset the keys to their default values.

If you have changed the NETLOGON Parameters, make sure and turn them back to '1' as shown below:

           DWORD  RequireSignOrSeal = 1
           DWORD  RequireStrongKey = 1

--Gd 15:47, 29 November 2009 (EDT)

Special Warning: If, as is likely the case, you are using the Windows Operating System to view this page and double-click the registry value (DNSNameResolutionRequired or DomainCompatibilityMode) to CnP into Windows' regedit, that one must take special care to make sure that when pasting the clipboard into the new value created in regedit to remove the space at the end of the value name that is likely included in the double-clicking of the registry value name.

Sidebar for the purpose of impressing importance of this Special Warning: Embarrassingly, it took me 8 hours today (1 June 2012) to troubleshoot a problem where DNSNameResolutionRequired in this Wiki was pasted "DNSNameResolutionRequired " into regedit. Obviously, no one could join the domain and no one thought twice about the fact that DNSNameResolutionRequired which looked right was actually very wrong. When it comes to Windows 7 joining a Samba PDC, as the Internet echos loudly, have these registry entries set and make sure these registry values are named correctly.

--s1037989 16:25, 4 June 2012 (CDT)

NOTES: with Samba 3.3.2, 3.3.3 and 3.3.4

Only for these versions, you have to change the NETLOGON parameters.

           DWORD  RequireSignOrSeal = 0
           DWORD  RequireStrongKey = 0

For other versions, you must not change them.

--Monyo 12:42, 6 April 2011 (CDT)

The changes of RequireSignOrSeal and RequireStrongKey are NOT recommended by the Samba Team. They will break interoperability with other Windows and Samba versions!

--bjacke 17 Jul 2011 (CEST)

NOTES: Error message during joining to the Domain

You will receive one warning about DNS domain name configuration after the join has succeeded:

   "Changing the Primary Domain DNS name of this computer to "" failed.
    The name will remain "MYDOM".  The error was:
    The specified domain either does not exist or could not be contacted" 

This warning can be ignored or silenced with setting other registry keys.

There is a hotfix available from Microsoft to address this, see KB2171571:You incorrectly receive an error message when you join a computer that is running Windows 7 or Windows Server 2008 R2 to a Samba 3-based domain for details.

Windows 7 Performance and Time Registry settings

I want to share some of my configuration settings, they add a major improvement in domain login speed and allow to use samba as time server under Windows 7 Professional:

       echo 'Windows Registry Editor Version 5.00
       ; Win7_Samba3DomainMember
       ; Speedup settings
       ; Can drive you nuts
       "EnableLUA"=dword:00000000' | tee Win7_Samba3DomainMember_jelledj.reg
       unix2dos Win7_Samba3DomainMember_jelledj.reg
       echo '@echo off
       echo WARNING: Do not close this window!!!
       c:\"Program Files\Windows Resource Kits\Tools\ntrights.exe" +r SeSystemTimePrivilege -u "Domain Users"
       echo WARNING: You may now close this window!!!
       echo.' | tee SeSystemTimePrivilege_jelledj.bat
       unix2dos SeSystemTimePrivilege_jelledj.bat
       echo '@echo off
       echo WARNING: Do not close this window!!!
       "C:\Program Files\Mozilla Firefox\firefox.exe"
       echo WARNING: You may now close this window!!!
       echo.' | tee rktools_jelledj.bat
       unix2dos rktools_jelledj.bat
       echo '@echo off
       echo WARNING: Do not close this window!!!
       NET USE Y: \\server\documenten /PERSISTENT:YES
       NET TIME \\server /SET /YES
       echo WARNING: You may now close this window!!!
       echo.' | tee /srv/storage/samba/netlogon/netlogon.bat
       unix2dos /srv/storage/samba/netlogon/netlogon.bat
       setfacl --recursive --modify u::rw,g::r,m:---,o:--- /srv/storage/samba/netlogon/netlogon.bat
       chmod g+r /srv/storage/samba/netlogon/netlogon.bat
       cat /srv/storage/samba/netlogon/netlogon.bat
       su -c "cat /srv/storage/samba/netlogon/netlogon.bat" jelledj

--Tuxcrafter 15:12, 18 January 2011 (CST)