From: Denys Fedoryschenko <denys@visp.net.lb>
To: Jesper Dangaard Brouer <hawk@diku.dk>
Cc: Stephen Hemminger <shemminger@vyatta.com>,
Patrick McHardy <kaber@trash.net>,
David Miller <davem@davemloft.net>,
netfilter-devel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH] iptables: new strict host model match
Date: Mon, 2 Mar 2009 15:46:23 +0200 [thread overview]
Message-ID: <200903021546.24187.denys@visp.net.lb> (raw)
In-Reply-To: <Pine.LNX.4.64.0903021427570.27363@ask.diku.dk>
On Monday 02 March 2009 15:42:33 Jesper Dangaard Brouer wrote:
> On Thu, 26 Feb 2009, Stephen Hemminger wrote:
> > This is a simple little iptables match that can be used to create the
> > Strong End System model, that router and other non-Linux customers
> > expect. There are management and other applications that use ping and
> > expect to only get a response when the interface with that address is up.
> > Normally, a Linux system will respond to a packet that arrives for any of
> > the system addresses independent of which link it arrives on.
>
> Is this no almost the same as:
>
> echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
>
I guess if some "smart guy" will set static association in his ARP table, he
can ignore this rule and "hack the host" over another ip, which sits on
internal interface for example.
next prev parent reply other threads:[~2009-03-02 13:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-27 1:52 [PATCH] iptables: new strict host model match Stephen Hemminger
2009-02-27 3:16 ` Jan Engelhardt
2009-02-27 3:23 ` Stephen Hemminger
2009-02-27 8:30 ` Jozsef Kadlecsik
2009-02-28 1:53 ` Jan Engelhardt
2009-02-28 2:10 ` Stephen Hemminger
2009-02-28 8:27 ` Jan Engelhardt
2009-03-02 11:02 ` Patrick McHardy
2009-03-02 13:42 ` Jesper Dangaard Brouer
2009-03-02 13:46 ` Denys Fedoryschenko [this message]
2009-03-02 18:53 ` Stephen Hemminger
2009-03-02 22:12 ` Patrick McHardy
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