Thanks to all for your responses. I was able to track this down by looking in
DHCP for machine names that I didn't recognize, and then doing portscan and
netbios scans on those machines. We're a small enough organization that I
could easily identify 3 machines I didn't know about. It turned out not to be
a problem--just a consultant with a very poorly chosen workgroup name.

Thanks again.

Gary

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gary_palmer (at) attbi (dot) com [email concealed]

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