netdev - Re: ARP Spoofing

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Message-ID: <20070502171619.020a4def@freekitty>
Date:	Wed, 2 May 2007 17:16:19 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Topher Fischer <javert42@...byu.edu>
Cc:	Chris Friesen <cfriesen@...tel.com>, netdev@...r.kernel.org
Subject: Re: ARP Spoofing

On Wed, 02 May 2007 17:45:05 -0600
Topher Fischer <javert42@...byu.edu> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Chris Friesen wrote:
> > Vlad Yasevich wrote:
> > 
> >> If by arp spoofing you mean receiving arp replies from multiple
> >> sources and
> >> trusting all of them, then I haven't seen anything.
> >>
> >> I don't know the history as to why nothing has has been done.
> > 
> > This concept is a valuable tool to allow for fast publishing of IP
> > address takeover in redundant-server situations.
> > 
> > There are ways in which it can be misused, but that doesn't make it an
> > invalid technique.
> 
> I don't think it would be too difficult to preserve this kind of
> functionality while improving security.  Is this really the only reason
> why nothing has been done to protect machines from ARP spoofing?
> 

Surely, you can do what you want with netfilter/arptables.

-- 
Stephen Hemminger <shemminger@...ux-foundation.org>
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