In windows you can select/deselect a network card to dynamically register its connection's IP address in AD-DNS. But what about a scenario where I have two IP addresses on a single network card? My server will have 1.2.3.4 and 5.6.7.8 on the same NIC, but I dont want clients trying to contact it via "5.6.7.8" so I need to ensure this isn't included in the dynamic DNS update (so it won't be included in the client DNS response). Registry setting? Something obvious I'm just overlooking? Mike Crowley: MCT, MCSE, MCTS, MCITP: Enterprise Messaging Administrator

I see someone has a similar concern:http://forums.technet.microsoft.com/en-US/winserverPN/thread/99590315-e196-4748-aaac-6819a19ed6c9/furthermore, it looks like the setting is controlled here:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DNSRegisteredAdaptersAnd the only choice is to have the adapter listed here or not. Not sure if any of these keys allow for further specification of exact IPs. [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DNSRegisteredAdapters\{52AEA8DF-FC71-49E9-8621-4EB5FCDBEBE9}] "Hostname"="OITSMX004D" "AdapterDomainName"="" "PrimaryDomainName"="DEVAD.xxx.EDU" "HostAddrs"=hex:01,00,00,00,01,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,17,00,00,00,00,00,00,00,20,02,80,08,46,3f,\ 00,00,00,00,00,00,80,08,46,3f,00,00,00,00,00,00,00,00,1c,00,00,00,80,00,00,\ 00,01,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00 "DnsServers"=hex:02,00,00,00,02,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,00,02,00,00,00,80,08,a3,04,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,10,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\ 00,02,00,00,00,80,08,0f,87,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,10,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00 "SentUpdateToIp"=hex:00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00 "SentPriUpdateToIp"=hex:02,00,00,35,80,08,a3,04,00,00,00,00,00,00,00,00,00,00,\ 00,00,00,00,00,00,00,00,00,00,00,00,00,00,10,00,00,00,00,00,00,00,00,00,00,\ 00,ff,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00 "Ttl"=dword:000004b0 "Flags"=dword:00000002 "CompartmentId"=dword:00000001 "StaleAdapter"=dword:00000000 "RegisteredSinceBoot"=dword:00000001 Mike Crowley: MCT, MCSE, MCTS, MCITP: Enterprise Messaging Administrator

We finished this project last year, but what I eneded doing was using two NICs. left normal registration on the first NIC and added all the IPs I didnt want registered on the 2nd NIC and disabled registration on the 2nd NIC. This worked well and I would use this approach again. Mike Crowley A+, Network+, Security+, MCT, MCSE, MCTS, MCITP: Enterprise Administrator / Messaging Administrator

it looks like you can change this behavior now. http://support.microsoft.com/?kbid=975808 All IP addresses are registered on the DNS servers when the IP addresses are assigned to one network adapter on a computer that is running Windows Server 2008 SP2 or Windows Vista SP2