Forum Moderators: phranque
Link to "www.domain.com/" or to "/" only.
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You'll need ISAPI_Rewrite and you will need to test for requests for the old domain and issue a 301 redirect to the URL you really want the user to see in that case. If your server used Apache, then this would be very easy to do. It is a bit more tricky in IIS; hopefully someone else can send you off to a decent tutorial.
As g1smd states above, you'll need to configure your rewrite to return a 301 response for the old URIs to the new URIs.