From: "christophe barbé" <christophe.barbe.ml@online.fr>
To: netfilter@lists.samba.org
Subject: Re: simple rules and unexpected traffic
Date: Thu, 4 Jul 2002 18:57:25 -0400 [thread overview]
Message-ID: <20020704225725.GD909@localhost> (raw)
In-Reply-To: <02070500543604.06327@Lms>
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On Fri, Jul 05, 2002 at 12:54:36AM +0200, Jan Humme wrote:
> On Friday 05 July 2002 00:45, christophe barbé wrote:
> > On Fri, Jul 05, 2002 at 08:35:53AM +1000, George Vieira wrote:
> > > Yes I've found that some user space programs can see stuff before
> > > iptables.. tcpdump too I think...
> >
> > Yes it sounds logical for tcpdump or tools like that (which pass the
> > interface in promiscuisious mode) to see everything. I was not expecting
> > the same from a unprivileged app like gkrellm.
> > It is stil unclear for me what is the data processing path.
> >
> > Has someone a clear picture of the packets path ?
>
> It is no problem to open a socket and receive a copy of all raw packets
> before they get to the kernel iptables modules. See "man 7 packet" for
> details.
>
> I believe this is how tcpdump does it too.
Ok it sounds logical.
Now the question is what is dropping these packets ? Apparently not
rp_filter, and not netfilter because I see no log for it.
Christophe
>
> Jan Humme.
--
Christophe Barbé <christophe.barbe@ufies.org>
GnuPG FingerPrint: E0F6 FADF 2A5C F072 6AF8 F67A 8F45 2F1E D72C B41E
Imagination is more important than knowledge.
Albert Einstein, On Science
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next prev parent reply other threads:[~2002-07-04 22:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-04 22:35 simple rules and unexpected traffic George Vieira
2002-07-04 22:45 ` christophe barbé
2002-07-04 22:54 ` Jan Humme
2002-07-04 22:57 ` christophe barbé [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-07-04 23:54 George Vieira
2002-07-05 0:34 ` christophe barbé
2002-07-04 23:44 George Vieira
2002-07-04 23:47 ` christophe barbé
2002-07-04 14:10 christophe barbé
2002-07-04 21:01 ` christophe barbé
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