Re: ARP spoofing attacks
From: Chris Moody (cmoody_at_qualcomm.com)
Date: 04/18/04
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Date: Sun, 18 Apr 2004 09:45:42 -0700 (PDT) To: Matthias Vallentin <x@pi-cubiq.de>
You could always place all critical resources (or even the gateway to the
internet, or other networks) behind a vpn termination. This way, you HAVE
to establish an encrypted session (to get anypace of value) and can
incorporate authentication. If all your traffic is properly encrypted, I
don't see how any method of sniffing will be a problem.
Baiscally, you would build your wireless subnet to be considered "hostile"
from the get-go. Only VPN tunnels are allowed access to anything of
value.
-Chris
On Fri, 16 Apr 2004, Matthias Vallentin wrote:
> you can't enable port-security on access points (wlan), can you? how can you protect yourself again wireless arp cache poisoning? once an attacker is associated with the network, he can sniff all the traffic and perform arp-attacks and put himself in a MITM-position...
> would a strong authentication be a solution for this problem?
>
> greetings,
>
> matthias
>
> * Chris Moody <cmoody@qualcomm.com> [Wed, 14 Apr 2004 16:32:16 -0700 (PDT)]:
>
> > The best way i know of thus far is to enable "port security" in some form
> > or another. Cisco switches can lock the port down to only allow a certain
> > MAC. If you spoof...the port drops.
> >
> > Arpwatch and a NIDS can also watch for this type of traffic...but it is
> > spotty and requires the architecture/heirarchy to be setup correctly for
> > it to work properly.
> >
> > Cheers,
> > -Chris
> >
> >
> >
> > On Wed, 14 Apr 2004, Amit Agrawal wrote:
> >
> > >
> > > Hi
> > > I have a question...How do u secure
> > > against ARP spoofing attacks...If
> > > not the whole subnet...I want to be
> > > sure that no one spoofs the IP of
> > > my gateway.
> > >
> > > Amit
> > >
> > >
> > > --
> > > ()
> > > 3-| |!-| c|
> > >
> > >
> > >
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---------------------------------------------------------------------------
Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off
any course! All of our class sizes are guaranteed to be 10 students or less
to facilitate one-on-one interaction with one of our expert instructors.
Attend a course taught by an expert instructor with years of in-the-field
pen testing experience in our state of the art hacking lab. Master the skills
of an Ethical Hacker to better assess the security of your organization.
Visit us at:
http://www.infosecinstitute.com/courses/ethical_hacking_training.html
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