Description of the WINS Filter1BRequests Feature in Windows 2000 (320241)

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

SYMPTOMS

The Filter1BRequests feature has been added to Windows Internet Name Service (WINS) for Windows 2000-based servers. Administrators can use this feature to limit the list of records that is returned by a WINS query for Domain 1b (Master Browser) entries.

The Filter1bRequests feature might be particularly useful in large networks that contain many unmanaged domains. One example of this is a large company that has a few corporate domains, but also has many rogue domains that belong to individual users.

Periodically, every primary domain controller in the domain runs a WINS query for the full list of Master Browsers that are registered in the network. This can cause a lot of useless data to be transferred across the network.

RESOLUTION

A supported feature that modifies the product's default behavior is now available from Microsoft, but it is only intended to modify the behavior that this article describes. Apply it only to systems that specifically require it. This feature may receive additional testing. Therefore, if the system is not severely affected by the lack of this feature, we recommend that you wait for the next Windows 2000 service pack that contains this feature.

To obtain this feature immediately, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

The English version of this feature should have the following file attributes or later:

   Date         Time   Version        Size     File name
   --------------------------------------------------------
   26-Mar-2002  22:49  5.0.2195.5257  152,848  Wins.exe
   27-Mar-2002  12:17  5.0.2195.5257   90,896  Winsevnt.dll

To Use the Filter1BRequests Feature

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.

After you install the hotfix, you must add a registry entry. Use this entry to make sure that requests for Domain<1B> are filtered before they are returned to the client. Only names that are on the list of approved domains will be returned.

Start Registry Editor (Regedt32.exe).
Locate and then click the following key in the registry:
HKLM\System\CurrentControlSet\Services\WINS\Parameters
On the Edit menu, click Add Value, and then add the following registry value:
Value name: Filter1BRequests
Data type: REG_MULTISZ
Value data: The list of allowed domains. Do not append the <1B> suffix to the domain names. Press ENTER after each name in the list. REG_MULTISZ values do not require a separator character.
Quit Registry Editor.

MORE INFORMATION

Note that the Filter1BRequests feature does not block Domain<1B> WINS registration requests. These are still allowed. Also, the Filter1BRequests feature does not affect the replication of Domain<1B> records.

For additional information about how to install multiple hotfixes with only one restart, 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