[unisog] Odd MAC addresses on switch

John Kristoff jtk at northwestern.edu
Mon Jul 12 14:09:02 GMT 2004

On Mon, 12 Jul 2004 08:21:22 -0400
"Alan Moen" <amoen at vp.sdcl.wayne.edu> wrote:

> Today, one of our network security folks took a look at his port on the
> switch and came up with a very large number of MAC addresses associated with
> it - 271 addresses. The odd part is that all but the last address (which was
> the MAC on the machine we found when we went to investigate) had the form
> xx-xx-61-21-18-9f where the first two bytes changed but the last four
> Does anyone have an idea what he may have been doing there?

I seem to recall seeing something like this a few months back.  I don't
remember all the details and I can't find anything in a cursory search
of my archives, but I seem to remember it was as a result of an Apple-based
application.  It may have been some kind of bridging function that was
enabled either in the application or the OS.  You might check for some
weirdness along those lines.


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