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Re: ARP spoofing attacks
From: Chris Moody <cmoody () qualcomm com>
Date: Sun, 18 Apr 2004 09:45:42 -0700 (PDT)

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


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