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Date: Sun, 18 Jan 2004 16:47:17 +0100
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To: Maciej Cetler <airot@lazir.toya.net.pl>
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Subject: Re: arp problem in /var/log/messages
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> 
> looks like someone is using tools like ettercap.

It could either be that - ARP cache poisoning - or some sort of clustering
software which uses changing MAC addresses (seen that).