How to Disable NetBT Proxy on Incoming Connections

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:
256986 Description of the Microsoft Windows Registry

Summary

By default, Netbios Proxy is enabled for incoming Remote Access Service (RAS) or virtual private network (VPN) connections on Windows XP and Windows Server 2003-based systems. This setting permits RAS clients to resolve the Netbios name on the local area network (LAN) that the RAS client is connected to. If you run the Ipconfig /all command from the command shell on the computer that is configured as the RAS or VPN server, this returns the information that the WINS Proxy Enabled value is set to Yes. In some cases, you may want to disable this setting.

More Information

After you enable the incoming connection setting, the EnableProxy value is set to 2.

NOTE: The EnableProxy value resides in the following registry location:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Netbt\Parameters\EnableProxy
To disable Netbios Proxy on the RAS or VPN server, follow these steps.

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.
  1. Start Registry Editor (Regedit.exe).
  2. Locate and then click the following registry key:
    HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Remoteaccess\Parameters\Ip\EnableNebtBcastFwd
  3. Change the value of the EnableNebtBcastFwd to 0.
  4. Quit Registry Editor.
  5. Restart the computer.
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ID articol: 319848 - Ultima examinare: 7 ian. 2008 - Revizie: 1

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