Re: Sniffer Detection
Michel Lavondes (lavondes@tidtest.total.fr)
Thu, 29 Feb 1996 10:52:44 +0000
In message <199602261352.HAA09836@shiva.ee.siue.edu>, Arve Kjoelen writes:
> > >>What about sniffing inside a firewall. Is there any way yet of possibly
>*detecting a
> sniffer?
> >
> > I participated in a study of this sometime back. Summary, not very likely.
> <snip>
>
> Unless, of course, the network admin has access to all machines within the
> firewall and (s)he can get the NIC to report that it is in promiscuous
> mode.
>
> -Arve.
>
> akjoele@ee.siue.edu
This may have been suggested before, but what about tricking the
machine into answering a packet it would receive only if in
promiscuous mode ? For instance, send it a packet with its own
IP address as destination, but with the wrong MAC address ? AFAIR,
most implementations don't bother to check for inconsistencies.
Am I missing something ?
Michel Lavondes (lavondes@tidtest.total.fr)
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