> Do you have a packet sniffer running on a PC in your network?

Say, now that you mention it, I believe there is a TCPView (or something
like that) available (along with a collection of other very sweet utilities)
at http://www.sysinternals.com.  These guys have a number of great utilities
that I use all the time (particularly with NTFS partitions), but I've not
used their TCP/IP capturing program.

-- Mitch

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