From: Pascal Hambourg <pascal.mail@plouf.fr.eu.org>
To: netfilter@lists.netfilter.org
Subject: Re: Obtain original address from redirected connection
Date: Thu, 04 May 2006 20:51:24 +0200 [thread overview]
Message-ID: <445A4D2C.1000001@plouf.fr.eu.org> (raw)
In-Reply-To: <20060502025450.73457687.pedro.werneck@terra.com.br>
[Sorry for the late answer, I just subscribed to the list]
Hello,
Pedro Werneck wrote :
>
> I have a daemon, a sort of proxy, written in Python, who receives
> redirected connections with a rule like this:
>
> iptables -t nat -A PREROUTING -j DNAT -p TCP -s source --to-destination host:port
>
> The problem is that I need access to the original destination address,
You can parse /proc/net/ip_conntrack on the NAT box, which contains the
list of the connections currently handled by conntrack/NAT. This is
how Squid retrieves the original destination address when running in
transparent mode.
Note : on "recent" kernels you need root privileges to read this file.
prev parent reply other threads:[~2006-05-04 18:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-02 5:54 Obtain original address from redirected connection Pedro Werneck
2006-05-02 6:36 ` Petr Pisar
2006-05-04 18:51 ` Pascal Hambourg [this message]
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