From: Florian Westphal <fw@strlen.de>
To: Chris Clayton <chris2553@googlemail.com>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: b118509076b3 (probably) breaks my firewall
Date: Thu, 8 Sep 2022 21:19:25 +0200 [thread overview]
Message-ID: <20220908191925.GB16543@breakpoint.cc> (raw)
In-Reply-To: <e5d757d7-69bc-a92a-9d19-0f7ed0a81743@googlemail.com>
Chris Clayton <chris2553@googlemail.com> wrote:
> Just a heads up and a question...
>
> I've pulled the latest and greatest from Linus' tree and built and installed the kernel. git describe gives
> v6.0-rc4-126-g26b1224903b3.
>
> I find that my firewall is broken because /proc/sys/net/netfilter/nf_conntrack_helper no longer exists. It existed on an
> -rc4 kernel. Are changes like this supposed to be introduced at this stage of the -rc cycle?
The problem is that the default-autoassign (nf_conntrack_helper=1) has
side effects that most people are not aware of.
The bug that propmpted this toggle from getting axed was that the irc (dcc) helper allowed
a remote client to create a port forwarding to the local client.
next prev parent reply other threads:[~2022-09-08 19:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-08 19:13 b118509076b3 (probably) breaks my firewall Chris Clayton
2022-09-08 19:19 ` Florian Westphal [this message]
2022-09-08 21:22 ` Chris Clayton
2022-09-08 21:48 ` Florian Westphal
2022-09-09 10:19 ` Pablo Neira Ayuso
2022-09-09 18:21 ` Chris Clayton
2022-09-09 18:31 ` Chris Clayton
2022-09-10 2:02 ` removing conntrack helper toggle to enable auto-assignment [was Re: b118509076b3 (probably) breaks my firewall] Pablo Neira Ayuso
2022-09-10 3:49 ` Willy Tarreau
2022-09-19 19:40 ` Jakub Kicinski
2022-09-19 20:23 ` Florian Westphal
2022-09-19 20:57 ` Jakub Kicinski
2022-09-19 21:27 ` Florian Westphal
2022-09-20 6:49 ` Chris Clayton
2022-09-20 9:01 ` Thorsten Leemhuis
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