The gethostbyaddr() Function May Take More Time Than Expected to Resolve an Unknown IP Address (308512)

The information in this article applies to:

Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional SP2

This article was previously published under Q308512

SYMPTOMS

When you use a Windows 2000-based computer and you disable network basic input/output system (NetBIOS) over Transmission Control Protocol/Internet Protocol (TCP/IP), the call to the gethostbyaddr function takes approximately five seconds to return error 11004 (WSANO_DATA) for an unknown Internet protocol (IP) address.

CAUSE

This problem occurs because no Windows Internet Name Service (WINS) queries or broadcast queries are used when you disable NetBIOS over TCP/IP. Because of this, the gethostbyaddr function is expected to immediately return after a Domain Name System (DNS) query.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

The English-language version of this fix should have the following file attributes or later:

   Date        Time   Version        Size     File name
   ----------------------------------------------------
   16-Nove-01  10:37  5.0.2195.4651  143,088  Netbt.sys

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.

MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 The Datacenter Program and Windows 2000 Datacenter Server Product

For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:

296861 Use QChain.exe to Install Multiple Hotfixes with One Reboot

For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Modification Type:	Minor	Last Reviewed:	9/26/2005
Keywords:	kbHotfixServer kbQFE kbbug kberrmsg kbfix kbnetwork kbWin2000PreSP3Fix kbWin2000sp3fix KB308512