From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
To: netfilter@vger.kernel.org, netfilter-devel@vger.kernel.org
Subject: Re: [HELP] why the string match does not work in nat tables?
Date: Mon, 31 Jan 2011 11:33:43 +0100 [thread overview]
Message-ID: <4D469007.7080606@plouf.fr.eu.org> (raw)
In-Reply-To: <4D46824B.2010706@netfilter.org>
Hello,
Pablo Neira Ayuso a écrit :
> On 31/01/11 03:47, JeHo Park wrote:
>> anyway, i wonder why there is no TCP payload in the skb of the string
>> or wurl match.
>
> Because you only see the first packet of the flow in the NAT table.
And the first packet of a TCP connection usually carries no data.
If you what you want to achieve is NAT a TCP connection based on the
payload, I am afraid this is not possible because the definitive NAT
mapping is defined from the first packet only.
next prev parent reply other threads:[~2011-01-31 10:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-31 1:53 [HELP] why the string match does not work in nat tables? JeHo Park
2011-01-31 2:09 ` Jan Engelhardt
[not found] ` <AANLkTik02D=agfFrc8VX+Wh4WAg_odm6cEcpbXvbgtqM@mail.gmail.com>
[not found] ` <alpine.LNX.2.01.1101310337270.19252@obet.zrqbmnf.qr>
2011-01-31 2:47 ` JeHo Park
2011-01-31 2:51 ` Jan Engelhardt
2011-01-31 2:59 ` JeHo Park
2011-01-31 3:34 ` netfilter - u32 module Sridhar Kumar
2011-01-31 9:36 ` Pablo Neira Ayuso
2011-01-31 9:35 ` [HELP] why the string match does not work in nat tables? Pablo Neira Ayuso
2011-01-31 10:33 ` Pascal Hambourg [this message]
2011-01-31 11:17 ` JeHo Park
2011-02-01 1:50 ` JeHo Park
2011-02-01 11:51 ` Jan Engelhardt
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