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From: Laura Garcia <nevola@gmail.com>
To: Pablo Neira Ayuso <pablo@netfilter.org>, Lukas Wunner <lukas@wunner.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>,
	Jozsef Kadlecsik <kadlec@netfilter.org>,
	Florian Westphal <fw@strlen.de>,
	Netfilter Development Mailing list 
	<netfilter-devel@vger.kernel.org>,
	coreteam@netfilter.org, netdev@vger.kernel.org,
	Martin Mares <mj@ucw.cz>, Dmitry Safonov <0x7f454c46@gmail.com>,
	Thomas Graf <tgraf@suug.ch>, Alexei Starovoitov <ast@kernel.org>,
	David Miller <davem@davemloft.net>
Subject: Re: [PATCH nf-next 3/3] netfilter: Introduce egress hook
Date: Thu, 23 Apr 2020 16:44:44 +0200	[thread overview]
Message-ID: <CAF90-WgoteQXB9WQmeT1eOHA3GpPbwPCEvNzwKkN20WqpdHW-A@mail.gmail.com> (raw)
In-Reply-To: <20200315132836.cj36ape6rpw33iqb@salvia>

On Sun, Mar 15, 2020 at 2:29 PM Pablo Neira Ayuso <pablo@netfilter.org> wrote:
>
> Hello Daniel,
>
> On Sat, Mar 14, 2020 at 01:12:02AM +0100, Daniel Borkmann wrote:
> > On 3/13/20 3:55 PM, Pablo Neira Ayuso wrote:
> [...]
> > > We have plans to support for NAT64 and NAT46, this is the right spot
> > > to do this mangling. There is already support for the tunneling
> >
> > But why is existing local-out or post-routing hook _not_ sufficient for
> > NAT64 given it being IP based?
>
> Those hooks are not coming at the end of the IP processing. There is
> very relevant IP code after those hooks that cannot be bypassed such
> as fragmentation, tunneling and neighbour output. Such transformation
> needs to happen after the IP processing, exactly from where Lukas is
> proposing.
>
> [...]
> > > infrastructure in netfilter from ingress, this spot from egress will
> > > allow us to perform the tunneling from here. There is also no way to
> > > drop traffic generated by dhclient, this also allow for filtering such
> > > locally generated traffic. And many more.

Hi,

Any chance to continue with this approach? I'm afraid outbound
af_packets also could not be filtered without this hook.

Thanks.

  reply	other threads:[~2020-04-23 14:44 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-11 11:59 [PATCH nf-next 0/3] Netfilter " Lukas Wunner
2020-03-11 11:59 ` [PATCH nf-next 1/3] netfilter: Rename ingress hook include file Lukas Wunner
2020-03-11 11:59 ` [PATCH nf-next 2/3] netfilter: Generalize ingress hook Lukas Wunner
2020-03-11 11:59 ` [PATCH nf-next 3/3] netfilter: Introduce egress hook Lukas Wunner
2020-03-11 14:05   ` Daniel Borkmann
2020-03-11 15:54     ` Lukas Wunner
2020-03-12 22:40       ` Daniel Borkmann
2020-03-13 14:55     ` Pablo Neira Ayuso
2020-03-14  0:12       ` Daniel Borkmann
2020-03-15 13:28         ` Pablo Neira Ayuso
2020-04-23 14:44           ` Laura Garcia [this message]
2020-04-23 16:05             ` Lukas Wunner
2020-04-27 23:44               ` Pablo Neira Ayuso
2020-04-28 20:11               ` Daniel Borkmann
2020-08-20 10:37                 ` Lukas Wunner
2020-08-20 16:35                   ` Lukas Wunner
2020-03-18  0:21 ` [PATCH nf-next 0/3] Netfilter " Pablo Neira Ayuso

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