When dynamically re-registering DNS, the DNS client attempts to replace any IP address associated with the DNS name it is registering with its' own IP address.
To prevent this behavior on all of your computer's adapters:
1. Open a CMD.EXE window.
2. Using REG.EXE, built into Windows XP and Windows Server 2003, or from the Windows 2000 Support Tools, type the following command and press Enter:
REG ADD HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters /V DisableReplaceAddressesInConflicts /T REG_DWORD /F /D 1
3. You must shutdown and restart your client for this entry to become effective.
NOTE: This entry is designed for zones that DO NOT use secure dynamic update.