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Date:      Sun, 13 Oct 2002 00:39:38 -0400
From:      wolf <mjoyner2@hq.dyns.cx>
Cc:        FreeBSD Security <freebsd-security@freebsd.org>
Subject:   Re: Kernel log message
Message-ID:  <3DA8F90A.7070101@hq.dyns.cx>
References:  <ODEMJJBMDNGMFJHKBCMFGEGHEAAA.ww@austin.rr.com> <20021013041740.GA39841@cowbert.2y.net>

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>Could someone explain to me what the following log message means:
>
>disco.wwallace.net kernel log messages:
>
>arp: 192.168.100.2 moved from 00:20:78:0d:5a:7f to 00:00:78:0d:5a:7f on
>
>de0
>
>Oct  5 08:03:57 disco /kernel: arp: 192.168.100.2 moved from
>
>00:20:78:0d:5a:7f to 00:00:78:0d:5a:7f on de0
>
>The machine in question (192.168.100.2) is a Windows 2000 machine that has
>had the same NIC for years.  Also, only one of the digits in the MAC
>address seems to have changed.  What could cause this?
>

1) The NIC card could be dieing. "same NIC for years"
2) Transmission error of some sort on you LAN
3) Problem w/ a packet switch.





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