From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r.rg.net (r.rg.net [198.180.152.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8F8A529D266 for ; Wed, 10 Jun 2026 16:33:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.180.152.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781109187; cv=none; b=J0FNRrh+/mgsV6zQcfCdkeEpcFaDIN7Yl2QN4OAZOpSGCPugAc1qnDnUtQ2SSOhJg069OLTuXJI42AGppOfOWYO80ynrN3gmh9xqW9wuEUUOksfG78RtqBK2jW7+CyyeGeiD+4YQnAJVAGRsmUzk8OYwWhw03NZ4oDG1KFb/rm4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781109187; c=relaxed/simple; bh=7CU3FSZJJHqKBFrNxsP5Ap0PeHyBCXMfLQ4N6XOQNJk=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=cQkxPu1ADi+f7qQgP/CTBvKDL1eNAcUWZOLmg8Q+7KzNCRrWCTWE3EUTnbZxf+xtxeF8+4bC87DRECV+FZDXF1+X+bxwJ6tc9vViHGg1kw+1waTjGigw6QNOz15ZIxvgRdPkwFzcp8YurfmWrwtzkNzyeDaqgaJuojWiT03uY34= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=psg.com; spf=pass smtp.mailfrom=psg.com; dkim=pass (2048-bit key) header.d=psg.com header.i=@psg.com header.b=QmGhUVwC; arc=none smtp.client-ip=198.180.152.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=psg.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=psg.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=psg.com header.i=@psg.com header.b="QmGhUVwC" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=psg.com; s=rgnet-mail; t=1781109185; bh=7CU3FSZJJHqKBFrNxsP5Ap0PeHyBCXMfLQ4N6XOQNJk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=QmGhUVwC7gy+9ACb2C5hZ1VnOBoIkMvFmQSGyAYi7MgCq5nyIYUKIz+ESMol25jxs cS3w+WiUHSIbeeS+U08WUDSp5tVAjWcFQW4RiVkThwey2zCc7AZdArj2ysRVC9BMRu MFgiYBRJjSF1+EfWq07C9B7SaHIc1dN63dVAYod9m04JKiIqKjsQw+mwOsF5EdpBsC dV+Vf8gXaSjLlEjhRAV9FVrJqpWlM3k9OYs7EBAZgrWeLtMegym25bQGfZNVLsV0gW sqVpTfxlCodcdWVNp0FLNcfgYT583zlMubYlooDbt6DkxELNAoJn742nkPtNttCLKM 6n53D42Ze1Y1g== Received: from ryuu.rg.net (localhost [127.0.0.1]) by r.rg.net (Postfix) with ESMTP id 1FE868026E; Wed, 10 Jun 2026 16:33:05 +0000 (UTC) Date: Wed, 10 Jun 2026 09:33:05 -0700 Message-ID: From: Randy Bush To: "Kerin Millar" Cc: netfilter@vger.kernel.org Subject: Re: prefix len confusion In-Reply-To: <6fcf67b9-4fee-4b1c-85f1-597afff788ba@app.fastmail.com> References: <7b1ed82b-3bdd-4cae-bb08-7f8479778a7a@app.fastmail.com> <6fcf67b9-4fee-4b1c-85f1-597afff788ba@app.fastmail.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/27.2 Mule/6.0 Precedence: bulk X-Mailing-List: netfilter@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII > table ip raw { > chain PREROUTING { > type filter hook prerouting priority raw; > ip daddr 42.642.11.82 tcp dport 22 meta nftrace set 1 > } > } > > > Next, run "nft monitor trace". thanks a million. this showed pretty conclusively that the `/etc/nftables.conf` was indeed correct and filtering as one would hope/expect. and i learned a new hack! so we are now looking for more subtle attack surface, e.g. loose source routing, bouncing off a legitimately open service on the same LAN, etc. we also see this (distributed source) attack on proxmox clusters' web interfaces 2026-06-07T02:01:39.274405+00:00 pv0 pvedaemon[2276]: authentication failure; rhost=::ffff:85.11.167.7 user=root@pam msg=Authentication failure 2026-06-07T02:01:42.970943+00:00 pv0 pvedaemon[2277]: authentication failure; rhost=::ffff:85.11.167.7 user=root@pam msg=Authentication failure can we safely just add ffff::0 to the v6 bogon list? randy