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Windows Sockets 2.0 Does Not Use DnsNbtLookupOrder Value
Article ID: 216470 - View products that this article applies to.
This article was previously published under Q216470
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:
(http://support.microsoft.com/kb/256986/EN-US/ )Description of the Microsoft Windows Registry
With Windows Sockets 2.0 (Winsock 2) installed, the registry entries for controlling name resolution order have no effect. Name resolution is carried out first using DNS and then using NetBIOS, even if the DNS resolution is successful.
Note that Winsock 2 is optional in Windows 95, which is initially configured with Windows Sockets 1.1, but is the default in Windows 98.
The Winsock 2 technology does not incorporate the name resolution provider ordering control that is a part of Winsock 1.1. Additionally, Winsock 2 as implemented for both Windows 95 and Windows 98 does not incorporate the registry control specified and provided for in the Microsoft Windows NT implementation.
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft Windows 98 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMSNOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
All localized versions of this fix should have the following file attributes or later:
Date Time Version Size File name Platform ------------------------------------------------------------ 03/03/99 2:59pm 4.10.2002 44,032 Rnr20.dll Windows 98 05/23/99 5:02pm 4.10.1662 43,520 Rnr20.dll Windows 95
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
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.
The registry control specified and provided for in the Windows NT implementation is:
Key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\VxD\MSTCPFor additional information about Winsock 2 and Windows 95, please see the following article in the Microsoft Knowledge Base:
Notes: 0 = DNS first, 1 = NBT first
NOTE: If the value is not in the registry, DNS is queried first.
182108For additional information about registry entries and Windows Sockets, please see the following articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/182108/EN-US/ )Availability of Windows Sockets 2.0 for Windows 95
(http://support.microsoft.com/kb/158474/EN-US/ )Windows TCP/IP Registry Entries
170619For additional information about Windows 98 and Windows 98 Second Edition hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/170619/EN-US/ )Windows 95 ServiceProvider Priority Values Not Applied
206071For additional information about Windows 95 hotfixes, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/206071/EN-US/ )General Information About Windows 98 and Windows 98 Second Edition Hotfixes
(http://support.microsoft.com/kb/161020/EN-US/ )Implementing Windows 95 Updates