From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Changli Gao <xiaosuo@gmail.com>
Cc: Oliver <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>,
xiaosuo@gmail.xom,
Netfilter Developer Mailing List
<netfilter-devel@vger.kernel.org>
Subject: Re: [PATCH] netfilter: Kill unreplied conntracks by ICMP errors
Date: Tue, 17 Dec 2013 17:58:21 +0100 [thread overview]
Message-ID: <20131217165821.GA13951@localhost> (raw)
In-Reply-To: <CABa6K_EoH23P8OYEDRhA4ihgKeZ-0OtW4gU0CcRLh2jDk3=8OA@mail.gmail.com>
On Tue, Dec 17, 2013 at 10:52:02PM +0800, Changli Gao wrote:
> On Tue, Dec 17, 2013 at 9:01 PM, Pablo Neira Ayuso <pablo@netfilter.org> wrote:
> >
> > Indeed. You can configure those two NATs to make them more
> > hole-punching friendly by dropping UDP packets to local closed ports,
> > so that conntrack entry won't be created.
>
> Yes. But it requires the explicit configuration. Why not make it work
> by default, although it may fail in some situation? Less is better
> than none, isn't it?
With this patch, an ICMP destination unreachable - fragmentation
needed coming after a big UDP packet will trigger the removal of the
UDP conntrack entry, that should not happen.
next prev parent reply other threads:[~2013-12-17 16:58 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-12 15:19 [PATCH] netfilter: Kill unreplied conntracks by ICMP errors Changli Gao
2013-12-15 6:57 ` Oliver
2013-12-17 13:01 ` Pablo Neira Ayuso
2013-12-17 14:52 ` Changli Gao
2013-12-17 16:58 ` Pablo Neira Ayuso [this message]
2013-12-19 4:29 ` Changli Gao
2013-12-19 19:51 ` Pablo Neira Ayuso
2013-12-17 14:46 ` Changli Gao
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