From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
To: netfilter@vger.kernel.org
Subject: Re: IPTABLES port forwarding woes
Date: Fri, 30 May 2008 21:11:32 +0200 [thread overview]
Message-ID: <48405164.3000706@plouf.fr.eu.org> (raw)
In-Reply-To: <48401A99.70408@soe.ucsc.edu>
Erich Weiler a écrit :
> Hmmm.. Follow up question to this. How would the outgoing connection
> back to the internet find it's way back to the remote internet host, if
> the source address was re-written to machine 1 when in came in to begin
> with? Wouldn't the original remote internet source address be lost in
> all the translation?
No, the connection tracking takes care of all this. The NAT operations
applied by iptables rules to the first packet creating the connection
are recorded and applied to subsequent packets in the same direction,
while the inverse operations are applied to reply packets in the
opposite direction.
> Thanks for your insight by the way!
You're welcome.
next prev parent reply other threads:[~2008-05-30 19:11 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-30 14:02 IPTABLES port forwarding woes Erich Weiler
2008-05-30 14:42 ` Pascal Hambourg
2008-05-30 15:17 ` Erich Weiler
2008-05-30 19:11 ` Pascal Hambourg [this message]
2008-05-30 21:06 ` Erich Weiler
-- strict thread matches above, loose matches on Subject: below --
2008-05-30 13:24 Erich Weiler
2008-05-30 13:53 ` Pascal Hambourg
2008-05-30 13:15 Erich Weiler
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