http://support.microsoft.com/?id=246804

SUMMARY

Depending on the configuration and services that are running on a particular computer, different components perform DNS updates. There is no centralized way, such as a tool or registry keys, to manage the DNS update behavior of all components. This article describes each component and how to modify that particular component’s behavior.

The article also discusses how to disable DNS updates in Microsoft Windows Server 2003. By default, client computers that are running Windows Server 2003 have DNS updates enabled.

INTRODUCTION

The following components perform DNS updates:

• Dynamic Host Configuration Protocol (DHCP) Client service
  These updates apply to all Windows 2000-based computers.
• DNS Server service
  These updates apply to Windows 2000-based DNS servers only.
• Net Logon service
  This updates apply to Windows 2000-based domain controllers only.
• Remote access client
  These updates apply to Windows 2000-based remote access clients only.

Note After you change one of these components by modifying the registry keys that are listed in this article, you must stop and restart the affected services. Sometimes, you must restart the computer. These instances are noted.

Forward and reverse per adaptor

To disable A and PTR resource record registrations that are performed for a specific adaptor by the DHCP Client service, use the following registry subkey:

Data type: REG_DWORD
Range: 0 – 1
Default value: 0

This disables DNS update registration on this adaptor. With DNS update, DNS client computers automatically register and update their resource records whenever address changes occur.

   Value   Meaning

   --------------------------------------------

   0       Enables DNS update registration

   1       Disables DNS update registration

Note For DNS updates to operate on any adaptor, it must be enabled at the system level and at the adaptor level. To disable DNS updates for a particular adaptor, add the DisableDynamicUpdate value to an interface name registry subkey, and then set its value to 1. To disable DNS updates on all adaptors in a computer, add the DisableDynamicUpdate value to the following registry subkey, and then set its value to 1:

Windows 2000 does not add this entry to the registry. You can add it by editing the registry or by using a program that edits the registry.

To make the changes to this value effective, you must restart Windows 2000.

Reverse per adaptor

There is no mechanism to disable PTR resource record registrations on a per-adaptor basis.