Re: Fwd: MAC / IP conflict

From: Bill Davidsen
Date: Sun Mar 28 2004 - 22:58:39 EST

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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