Security Basics mailing list archives

Re: Dsniff usage


From: Geert VAN ACKER <geert.vanacker () pandora be>
Date: Thu, 07 Jul 2005 11:03:52 +0200

Ron wrote:
Dsniff will (by default) try to set the NIC to permicuous mode, and it
functions like a regular sniffer.

So:
1) You need an administrator account to sniff traffic and set permicuous
mode
2) It can sniff any traffic that ends up at your network card.  So if
you're on a hub, you see everything plugged into it, and on a switch you
just see your own traffic, or any traffic routed through you.  It
doesn't use ARP poisoning, you would have to do that yourself (with
ettercap or nemesis or something).

Dsniff in fact is a suite of networktools. One of them, arpspoof(8) can
do arp poisoning. Don't forget to switch on kernel ip forwarding, or the
communication dies at your nic.

arpspoof -t host_you_want_to_observer default_gateway

-- 
Geert VAN ACKER


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