>Have you tried something like 'arp -a | grep <MAC>'?  This yields a
>hostname which can be fed into nslookup.
 
if the addy is in the cache, 'arp -an' will list the ip addy
and the MAC addy. no nslookup needed.

'tcpdump -e' will list MAC addresses in the dump and you can then
see who the owner of that MAC address is.

m*

-- 
"The Shining One"
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