From: Florian Westphal <fw@strlen.de>
To: Marcin Kabiesz <marcin.kabiesz@smarthost.pl>
Cc: netfilter@vger.kernel.org
Subject: Re: NAT translation problem - leakage of packets with original source address
Date: Thu, 10 Mar 2022 13:08:09 +0100 [thread overview]
Message-ID: <20220310120809.GD26501@breakpoint.cc> (raw)
In-Reply-To: <0e142c6e43516aa01a9bcf6f6df9b31d@smarthost.pl>
Marcin Kabiesz <marcin.kabiesz@smarthost.pl> wrote:
> is it possible that with the OpenVPN interface tun0 every now and then some
> packets with a private source address are visible and forwarded to the
> router?
Yes, NAT is only applied to packets that conntrack considers sane/valid.
You can e.g. add a drop rule for INVALID packets.
next prev parent reply other threads:[~2022-03-10 12:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-10 11:40 NAT translation problem - leakage of packets with original source address Marcin Kabiesz
2022-03-10 12:08 ` Florian Westphal [this message]
2022-03-10 12:33 ` Marcin Kabiesz
2022-03-10 14:53 ` Florian Westphal
2022-03-11 9:11 ` Marcin Kabiesz
2022-03-11 12:53 ` Florian Westphal
2022-03-11 13:45 ` Marcin Kabiesz
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