MS Website on Server and Domain IsolationMS Website on Server and Domain IsolationI don't know how I missed this one, but Microsoft has posted an excellent site on Server and Domain Isolation.
This shows how you can use the tools built in to Windows XP SP2 and Windows Server 2003 SP1 to only allow those machines to communicate on your network that you really know and trust.
Bye, bye Mr. Let-me-just-plug-my-computer-in-to-see-what-I-can-find.