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From: Alex Forster <aforster@cloudflare.com>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: Kyle Bowman <kbowman@cloudflare.com>,
	kernel-team <kernel-team@cloudflare.com>,
	Jozsef Kadlecsik <kadlec@netfilter.org>,
	Florian Westphal <fw@strlen.de>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	netfilter-devel@vger.kernel.org, coreteam@netfilter.org,
	linux-kernel@vger.kernel.org,
	Network Development <netdev@vger.kernel.org>
Subject: Re: [PATCH] netfilter: xt_NFLOG: allow 128 character log prefixes
Date: Tue, 27 Jul 2021 17:45:09 -0500	[thread overview]
Message-ID: <CAKxSbF1cxKOLTFNZG40HLN-gAYnYM+8dXH_04vQ8+v3KXdAq8Q@mail.gmail.com> (raw)
In-Reply-To: <20210727215240.GA25043@salvia>

> Yes, you can update iptables-nft to use nft_log instead of xt_LOG,
> that requires no kernel upgrades and it will work with older kernels.

I've always been under the impression that mixing xtables and nftables
was impossible. Forgive me, but I just want to clarify one more time:
you're saying we should be able to modify iptables-nft such that the
following rule will use xt_bpf to match a packet and then nft_log to
log it, rather than xt_log as it does today?

    iptables-nft -A test-chain -d 11.22.33.44/32 -m bpf --bytecode
"1,6 0 0 65536" -j NFLOG --nflog-prefix
"0123456789012345678901234567890123456789012345678901234567890123456789"

We had some unexplained performance loss when we were evaluating
switching to iptables-nft, but if this sort of mixing is possible then
it is certainly worth reevaluating.

  reply	other threads:[~2021-07-27 22:45 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-27 19:00 Kyle Bowman
2021-07-27 19:54 ` Pablo Neira Ayuso
2021-07-27 20:06   ` Alex Forster
2021-07-27 21:10     ` Pablo Neira Ayuso
2021-07-27 21:22       ` Alex Forster
2021-07-27 21:27         ` Pablo Neira Ayuso
2021-07-27 21:44           ` Alex Forster
2021-07-27 21:52             ` Pablo Neira Ayuso
2021-07-27 22:45               ` Alex Forster [this message]
2021-07-27 23:02                 ` Pablo Neira Ayuso
2021-07-28  1:43                 ` [netfilter-core] " Phil Sutter
2021-07-30 18:27                   ` Kyle Bowman
2021-08-01 14:14                     ` Jeremy Sowden

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