Article ID: 325465
Article Last Modified on 10/29/2007
APPLIES TO
- Microsoft Windows Server 2003, 64-Bit Datacenter Edition
- Microsoft Windows Server 2003, 64-Bit Enterprise Edition
- Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
- Microsoft Windows Server 2003, Enterprise Edition
- Microsoft Windows Server 2003, Standard Edition (32-bit x86)
This article was previously published under Q325465
Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
SUMMARY
By default, Active Directory administrative tools in the Windows Server 2003 family sign and encrypt all Lightweight Directory Access Protocol (LDAP) traffic. Signing LDAP traffic guarantees that the packaged data comes from a known source, has not been tampered with and does not hit the wire in clear text where network trace utilities like Network Monitor can view it. Active Directory administration tools may also negotiate by using the NTLM authentication protocol instead of LDAP signing. Two scenarios that invoke NTLM authentication include the following scenarios:
- The administration of Windows 2000 domain controllers that are located in an external forest that is connected by earlier-version trusts.
- Focusing MMC snap-ins against a specific domain controller that is referenced by its IP address. For example, you click Start, click Run, and then type dsa.msc /server=
x.x.x.x, wherex.x.x.xis the IP address of the domain controller.
To use these Windows Server 2003 Active Directory administrative tools when NTLM authentication is negotiated with Microsoft Windows 2000-based domain controllers, administrators must take either of the following actions:
- Install Windows 2000 Service Pack 3 (SP3) on Windows 2000-based domain controllers.
-or-
- Turn off LDAP signing and sealing in the registry of the client computer that is running the administrative tools, and then restart the tools on the client.
The Windows Server 2003 snap-ins and command-line tools that automatically secure LDAP traffic over the network include:
- Active Directory Domains and Trusts
- Active Directory Sites and Services
- Active Directory Schema
- Active Directory Users and Computers
- ADSI Edit
- Dsmove.exe
- Dsrm.exe
- Dsadd.exe
- Dsget.exe
- Dsmod.exe
- Dsquery.exe
- Group Policy Management Console
- Object Picker
To maintain a secure network, Microsoft recommends that you sign and encrypt administrative LDAP traffic by deploying the Windows Server 2003 administrative tools exclusively on Microsoft Windows XP and Windows Server 2003 member computers and Windows Server 2003 and Windows 2000 Service Pack 4 (SP4) domain controllers.
With Windows 2000 Service Pack 2 and Earlier
Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.To use the Windows Server 2003 Active Directory administrative tools to manage Windows 2000-based domain controllers with Windows 2000 Service Pack 2 (SP2) or earlier installed when NTLM authentication is negotiated, you can configure the administrative tools to communicate by using non-secured LDAP traffic. To disable signed or encrypted LDAP traffic use the following steps:
- Open Registry Editor.
- In Registry Editor, locate to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AdminDebug\ADsOpenObjectFlags. - Click Edit, point to New, and then click DWORD Value.
- In the text box that appears, type ADsOpenObjectFlags and then press enter.
- Double-click the ADsOpenObjectFlags registry key you just created, and then change the Value Data to one of the following values
Value Data (Hexadecimal) Disables 1 Signing 2 Encryption 3 Encryption and Signing
Caution This procedure will disable the use of signed or encrypted LDAP traffic for some Active Directory administrative tools. We recommend that you avoid disabling this feature.
To turn off the signature and encryption of LDAP traffic for the Windows Server 2003 Active Directory tools, set the ADsOpenObjectFlags value to 0x03 in the following registry key on the client computer:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AdminDebug\ADsOpenObjectFlags
Restart the administrative tools after you set the ADsOpenObjectFlags registry key. Administrators can also use Windows 2000 versions of the tools against Windows 2000-based domain controllers with SP2 or earlier on Windows 2000-based clients and servers. The client may not negotiate a connection with the earlier-version server if the client tries to authenticate by using NTLM. For example, this may occur in cross-forest trusts or when the client tries to connect to the server by means of an IP address.
The Windows Server 2003 snap-ins and command-line tools that automatically secure LDAP traffic over the network. Possible error messages include:
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