NETBIOS Node Status Query Returns First Instance of Unique Name

• Microsoft Windows NT Workstation versions 3.5, 3.51, 4.0
• Microsoft Windows NT Server versions 3.5, 3.51, 4.0
• Microsoft Windows 2000 Professional
• Microsoft Windows 2000 Server
• Microsoft Windows 2000 Advanced Server

SYMPTOMS

When a gethostbyaddr() uses a NETBIOS Node Status Query to return the Machine Name of a device, it will return the first instance of the machine name that is registered as Unique [00h]. The order of the Unique <00> name registered can be viewed by running NBTSTAT -N at a command prompt.

CAUSE

Some services, other than the Workstation, that Register as Unique with the [00h] entry, will show up in the NETBIOS Node Status Query response as well as the Machine Name. These names can be returned by a gethostbyaddr() and can incorrectly identify the computer if they are listed first in the response above the Workstation Name entry.

Node IpAddress: [130.0.7.1] Scope Id: []

            NetBIOS Local Name Table

   Name               Type              Status
--------------------------------------------------
IS~FARMER             <00>  UNIQUE      Registered
FARMER                <00>  UNIQUE      Registered
USA                   <00>  GROUP       Registered
FARMER                <03>  UNIQUE      Registered
FARMER                <20>  UNIQUE      Registered
FARMER+++++++++       <BE>  UNIQUE      Registered
INet~Services         <1C>  GROUP       Registered
TESTER                <03>  UNIQUE      Registered 

RESOLUTION

Stop and restart the service or services whose names are Registered as Unique [00h] above the Workstation Service entry in the NetBIOS Local Name Table.

Additional query words: prodnt

Keywords : kbnetwork nttcp
Version : WINDOWS:2000; winnt:3.5,3.51,4.0
Platform : WINDOWS winnt
Issue type :