NetBT Clients Can Only Connect if They Are Set to Use B-Node Name Resolution

If clients try to connect to a server and are configured to use a node type other than B-Node name resolution (for example, H-,M-, or P-Node), they can no longer connect to the server and the following error message is displayed:

This problem occurs because the server replies to a name query from the client with a group name response instead of a unique name response. Without the hotfix below, the NetBT client only allows a connection attempt to a group name to occur if it is configured as a B-Node client.

Note that this problem only affects connections to servers that reply to name queries with a group name, rather than a unique name response. At present, no server implementations supplied by Microsoft reply with group names. Only third-party server implementations are likely to be affected by this problem.

Windows NT Server or Workstation 4.0

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:

• http://www.microsoft.com/downloads/details.aspx?familyid=E396D059-E402-46EF-B095-A74399E25737&displaylang=en/ (http://www.microsoft.com/Windows/ServicePacks/) -or-
  
  
• 152734  (http://support.microsoft.com/kb/152734/EN-US/ ) how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

Windows NT Server 4.0, Terminal Server Edition

To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

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 NT Server version 4.0, Terminal Server Edition Service Pack 6.

This new version of Netbt.sys allows connection to the first name returned in a group name response regardless of the node type. It does not attempt to connect to any other names that may be returned in the group name response.