netdev - Re: nftables, prerouting and rate limiting

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Message-ID: <aGm8JGRpR8oPQ2wR@strlen.de>
Date: Sun, 6 Jul 2025 01:58:28 +0200
From: Florian Westphal <fw@...len.de>
To: "Brian J. Murrell" <brian@...erlinx.bc.ca>
Cc: netdev@...r.kernel.org
Subject: Re: nftables, prerouting and rate limiting

Brian J. Murrell <brian@...erlinx.bc.ca> wrote:
> In that case, is the rate limiting being applied to only connection
> establishing packets (i.e. SYN, SYN/ACK three-way handshake packets in
> the case of TCP as similar to the above description for the filter
> case) or is it applying to every packet in the connection/stream?

It is only applied to the first ("new") packet.  For tcp, to the
syn (but not any others including syn/ack).