Server 2008 RRAS Internal adaptor causing duplicate DNS entry for host

Question

I have Server 2008 configured with AD, DNS, DHCP and Routing and Remote Access.  The Server is set-up with a static IP address 192.168.127.2 and the DHCP allocates addresses in the range 192.168.127.100/199 to clients.  The RRAS is automatically configured with three adaptors "Loopback" (127.0.0.1), "Local Area Connection" (192.168.127.2) and "Internal" (192.168.127.112 allocated by DHCP).
The problem is that there are two entries created in DNS for the host, MYSERVER 192.168.127.2 and MYSERVER 192.168.127.112.  This cause a problem with the client computers when they do a DNS lookup in that the MYSERVER ip address is sometimes returned as 192.168.127.112 at logon causing network shares assignment in the logon script to fail (among others).  If the DNS entry is deleted manually everything functions again for a while until the DNS entry is mysteriously created again.
Can anyone help???

Answer 1

I agree with Bill, you should not run RRAS service on DC.
If you need workaround
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Adapters\<Interface name>\MaxNumberOfAddressesToRegister
Data type: REG_DWORD
Range: 0x0 - 0xFFFFFFFF
This setting determines the maximum number of IP addresses that can be registered in DNS for this adaptor.
If the value of this entry is 0, IP addresses cannot be registered for this adaptor.
OR
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<Interface name>\DisableDynamicUpdate
0      Enables DNS update registration
1      Disables DNS update registration
Please place one of above registry key for adapter that you don't want to register in DNS.
Hope this helps.