Microsoft KB Archive/817770

= mapping with FQDN name fail with error 53 or 1231 =

PSS ID Number: 817770

Article Last Modified on 12/18/2003

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The information in this article applies to:


 * Microsoft Windows XP Professional
 * the operating system: Microsoft Windows 2000
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional
 * Microsoft Windows 2000 Server

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SYMPTOMS
When you try to map a network share using the Fully Qualified Domain Name of the server, you receive an error message: &quot;the network location cannot be reached&quot; If you do a net use or a net view using the FQDN of the server:
 * on a windows 2000 client you receive an error 53: &quot;the network path was not found&quot;
 * on a windows XP client you receive an error 1231: &quot;the network location cannot be reached&quot;

The mapping and net use and net view commands works fine with the netbios name of the server or its IP address. You can ping the server by its FQDN, netbios name or IP address.

If you do a network trace you won't see any DNS query coming out of the client. 

CAUSE
The &quot;TCP/IP NetBIOS Helper&quot; Service is not started on the client computer. 

Launch services.msc and set the &quot;TCP/IP NetBIOS Helper&quot; Service's startup type to Automatic and start it.



STATUS
This behavior is by design. 

MORE INFORMATION
&quot;TCP/IP NetBIOS Helper&quot; Service enables support for NetBIOS over TCP/IP (NetBT) service and NetBIOS name resolution. This service is an extension of the kernel mode NetBT.

It should be considered an integral part of NetBT, not a normal service. It does two things for NetBT, which cannot be done in kernel mode:
 * It performs DNS name resolution
 * It pings a set of IP address and returns a list of reachable IP addresses

If this service is disabled, NetBT's clients, including Redirector (RDR), SRV, Netlogon, and Messenger, could stop responding.

Keywords: KB817770

Technology: kbOSWin2000 kbOSWinSearch kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000Pro kbwin2000ProSearch kbwin2000Search kbwin2000Serv kbwin2000ServSearch kbWinAdvServSearch kbWinXPPro kbWinXPProSearch kbWinXPSearch

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