Re: Fwd: MAC / IP conflict

[Bill Davidsen]

Jad Saklawi wrote:
> ----- Forwarded message from Hisham Mardam Bey -----
>    Date: Sun, 21 Mar 2004 13:52:59 +0200
>
> In short, I need to detect when someone on the network uses my MAC and
> my IP address.
>
> Longer story follows. I am on a LAN which might have some potentially
> dangerous users. Those users might spoof my MAC address and additionally
> use my IP address, thus forcing my box to go offline, and not be able to
> communicate with my gateway. What I need is a passive way to check for
> something of the sort, and perhaps a notofication into syslog (the
> latter is not very important).

Use arpwatch, it detects ALL changes of IP<=>MAC mapping.

--
bill davidsen <davidsen@xxxxxxx>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979
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