From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Florian Westphal <fw@strlen.de>
Cc: netfilter-devel@vger.kernel.org
Subject: Re: [PATCH nf-next] netfilter: conntrack: do not enable connection tracking unless needed
Date: Mon, 31 Jul 2017 20:16:17 +0200 [thread overview]
Message-ID: <20170731181617.GA15144@salvia> (raw)
In-Reply-To: <20170728092204.11953-1-fw@strlen.de>
On Fri, Jul 28, 2017 at 11:22:04AM +0200, Florian Westphal wrote:
> Discussion during NFWS 2017 in Faro has shown that the current
> conntrack behaviour is unreasonable.
>
> Even if conntrack module is loaded on behalf of a single net namespace,
> its turned on for all namespaces, which is expensive. Commit
> 481fa373476 ("netfilter: conntrack: add nf_conntrack_default_on sysctl")
> attempted to provide an alternative to the 'default on' behaviour by
> adding a sysctl to change it.
>
> However, as Eric points out, the sysctl only becomes available
> once the module is loaded, and then its too late.
>
> So we either have to move the sysctl to the core, or, alternatively,
> change conntrack to become active only once the rule set requires this.
>
> This does the latter, conntrack is only enabled when a rule needs it.
Applied, thanks.
prev parent reply other threads:[~2017-07-31 18:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-28 9:22 [PATCH nf-next] netfilter: conntrack: do not enable connection tracking unless needed Florian Westphal
2017-07-31 18:16 ` Pablo Neira Ayuso [this message]
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