From: Ramin Dousti <ramin@cannon.eng.us.uu.net>
To: Stephen Bylo <stephenbylo@yahoo.com.sg>
Cc: Ramin Dousti <ramin@cannon.eng.us.uu.net>, netfilter@lists.netfilter.org
Subject: Re: DNAT/SNAT & existing connections
Date: Thu, 17 Jul 2003 08:29:07 -0400 [thread overview]
Message-ID: <20030717122907.GA30482@cannon.eng.us.uu.net> (raw)
In-Reply-To: <20030717021443.65646.qmail@web13104.mail.yahoo.com>
On Thu, Jul 17, 2003 at 10:14:43AM +0800, Stephen Bylo wrote:
> If I want *existing* UDP connections to be diverted, I
> need to change both the NAT table *and* the connection
> tracking table, is this right? Can somebody tell me if
> this can be done with iptables? Do I have to hack the
> code? I may do so if need be. Is there another NAT
> sollution out there that can do what I need?
> Is using a NAT to divert existing UDP streams
> technically possible?
I think one way of doing this is to reduce the conntrack timeout for
UDP to almost nihil so that you see the effect of adding 2 to the nat
immidiately. But in that case UDP returns would not benefit from the
implicit conntrack structure and you need to allow the return traffic
explicitly.
Ramin
>
> Thanx for your help.
> Steve
next prev parent reply other threads:[~2003-07-17 12:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-15 10:01 DNAT/SNAT & existing connections Stephen Bylo
2003-07-15 14:04 ` Ramin Dousti
2003-07-16 2:12 ` Stephen Bylo
2003-07-16 2:50 ` Ramin Dousti
2003-07-16 5:25 ` Stephen Bylo
2003-07-16 14:06 ` Ramin Dousti
2003-07-17 2:14 ` Stephen Bylo
2003-07-17 12:29 ` Ramin Dousti [this message]
2003-07-18 1:09 ` Stephen Bylo
2003-07-18 13:59 ` Ramin Dousti
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