If your PDC is multihomed because it serves as a router, and you cannot promote a singlehomed backup domain controller (BDC) to PDC, you can try the following technique to work around this problem.
Unbind the WINS Client (TCP/IP) interface from all your adaptors except for one. This will also unbind the NetBIOS, Workstation, and Server interfaces from this card. We recommend that these bindings remain on the adaptor that is on the busiest segment. Although the WINS Client (TCP/IP) interface is unbound from the other adaptors, there will still be connectivity to the PDC from the other segments. The TCP/IP Protocol interface is left bound, which will be able to route the requests to the bound interface. After unbinding the additional adaptors, you should make sure that WINS and any LMHosts files do not refer to the unbound adapters.
To unbind the WINS Client (TCP/IP) interface, follow these steps:
1. In Control Panel, double-click Network.
2. Click the Bindings tab.
3. In the Show Bindings For box, select All Adapters.
4. Expand all the adaptors.
5. Select WINS Client (TCP/IP), and then click Disable.
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by: PakaPosted on 2008-03-24 at 03:28:37ID: 21192678
I would recommend setting up a dedicated RRAS server. Making a DC an RRAS server exposes it to the internet and creates all kinds of headaches like the ones you are experiencing. That said, this link might help: forums/thr ead-145094 1.php
http://www.pcreview.co.uk/