linux-kernel - Re: [RFC PATCH 0/2] restore original default of nf_conntrack

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Message-ID: <CA+55aFyDbDxcT+OjcxLxJ87MsFgNi0WWNoBSzZvWgA+yuQSXkg@mail.gmail.com>
Date:   Mon, 23 Jan 2017 17:09:55 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Jiri Kosina <jikos@...nel.org>
Cc:     Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        Florian Westphal <fw@...len.de>,
        NetFilter <netfilter-devel@...r.kernel.org>,
        coreteam@...filter.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        info@...lonka.cz
Subject: Re: [RFC PATCH 0/2] restore original default of nf_conntrack_helper sysctl

On Mon, Jan 23, 2017 at 4:06 PM, Jiri Kosina <jikos@...nel.org> wrote:
>
> Considering this being really close to the "userspace breakage"
> borderline, I'm CCing Linus as well.

For all I know, there may be some security reason why we really don't
want the automatic helpers, even if they can be convenient.

Also, you can just enable them with a kernel command line or a sysctl,
so it's not like you can't get the old behavior back.

Do networking people have any comments? Was there a reason to actually
switch the default? Because the commit messages aren't all that
helpful.

               Linus