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From: Florian Westphal <fw@strlen.de>
To: louis.t42@caramail.com
Cc: netfilter@vger.kernel.org
Subject: Re: Nftables ct count over 2 counter continues to trigger with only 1 connection
Date: Fri, 24 Oct 2025 13:45:07 +0200	[thread overview]
Message-ID: <aPtmw-suGrj2iLC9@strlen.de> (raw)
In-Reply-To: <trinity-85c72a88-d762-46c3-be97-36f10e5d9796-1761173693813@3c-app-mailcom-bs12>

louis.t42@caramail.com <louis.t42@caramail.com> wrote:
> I have read the documentation and asked on Stack Exchange but am unable to find an answer to the following behavior.
> 
> Given this table and chain where 123.123.123.123 is my own address:
> 
> table ip mytable {
>         chain mychain {
>                 type filter hook input priority filter; policy accept;
>                 ip saddr != 123.123.123.123 drop
>                 ip saddr 123.123.123.123 ct count over 2 counter
>         }
> }

After looking at Fernandos analysis, does this work when you restrict
this to new packets, i.e.:

	ct state new jump {
		ip saddr != 123.123.123.123 drop
		ip saddr 123.123.123.123 ct count over 2 counter
	}

This is supposed to only ever add new connections and not re-add established
ones.

  parent reply	other threads:[~2025-10-24 11:45 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-22 22:54 Nftables ct count over 2 counter continues to trigger with only 1 connection louis.t42
2025-10-23 11:42 ` Pablo Neira Ayuso
2025-10-23 14:00 ` Fernando Fernandez Mancera
2025-10-24 11:45 ` Florian Westphal [this message]
2025-10-27 13:54   ` louis.t42
2025-10-27 22:25     ` Pablo Neira Ayuso

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