full-disclosure - Promiscious Device Detection

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Message-ID: <44102954.5010807@list.za.net>
Date: Thu Mar  9 12:59:40 2006
From: full-disclosure at list.za.net (Q Beukes)
Subject: Promiscious Device Detection

i know how it would be done.

just thought if i could find the code/tool it could save me alot of time.

Simon Richter wrote:
> Hi,
>
> Q Beukes wrote:
>
>> I am looking for linux utility that checks if a specified machine's
>> network device is in promiscious mode or not.
>
> Technically, promiscuous mode only affects packet reception, so it is
> pretty difficult to detect; however most packet sniffers will not hide
> the packets that would have been filtered normally from the kernel, so
> the kernel should react to e.g. a ping or SYN packet that has the
> correct destination IP address for that host, but would normally be
> filtered by the MAC (e.g. with a different destination MAC address).
>
> I don't have a readymade utility for that (I'd code it if need arises,
> but the days of Cheapernet are gone), but you can test from the shell
> by creating a static ARP entry using the arp(8) tool and then pinging
> the IP.
>
>    Simon
>