Windows NT 4.0 ServiceProvider Priority Values Not Applied (171567)


The information in this article applies to:

  • Microsoft Windows NT Workstation 4.0
  • Microsoft Windows NT Server 4.0
This article was previously published under Q171567

SYMPTOMS

You may notice that changing the ServiceProvider priority values, as specified in Knowledge Base article 139270, "How to Change Name Resolution Order on Windows 95 and Windows NT," does not change the hostname resolution order as expected.

CAUSE

Unlike Windows NT 3.x, Windows NT 4.0 does not implement the ServiceProvider priority values.

RESOLUTION

To resolve this problem, install the latest service pack for Windows NT.

For additional information about obtaining the latest Windows NT 4.0 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed that this is a problem in Windows NT 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 4.

STATUS

Microsoft has confirmed that this is a problem in Windows NT 4.0.

MORE INFORMATION

In Windows NT 4.0 Service Pack 4, Microsoft added a new registry value to the TCP/IP service that allows an administrator the option of changing the hostname resolution order. By default, hostname resolution is performed by Domain Name Service (DNS) first, followed by NetBIOS over TCP/IP (NetBT), if DNS fails. With the use of this registry value, the order of hostname resolution can be reversed.

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 change the hostname resolution order (between DNS and NetBT name resolution mechanisms), perform the following steps:
  1. Run Registry Editor (Regedt32.exe).
  2. Go to the following key in the registry: 
       HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
  3. On the Edit menu, click Add Value and enter the following value information: 
          Value Name: DnsNbtLookupOrder
      Data Type:  REG_DWORD
      Value:      1 or 0 (default=0, value of 1 causes NetBT name
                  resolution to be attempted before DNS)
  4. Exit the Registry Editor and restart the computer for the change to take effect.
Modification Type:MinorLast Reviewed:9/23/2005
Keywords:kbHotfixServer kbQFE kbbug kbfix kbnetwork KB171567 kbAudITPRO
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