From: Randy Bush <randy@psg.com>
To: "Kerin Millar" <kfm@plushkava.net>
Cc: netfilter@vger.kernel.org
Subject: Re: prefix len confusion
Date: Wed, 10 Jun 2026 09:33:05 -0700 [thread overview]
Message-ID: <m2o6hi1hku.wl-randy@psg.com> (raw)
In-Reply-To: <6fcf67b9-4fee-4b1c-85f1-597afff788ba@app.fastmail.com>
> 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
next prev parent reply other threads:[~2026-06-10 16:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-10 0:10 prefix len confusion Randy Bush
2026-06-10 0:51 ` Kerin Millar
2026-06-10 1:01 ` Randy Bush
2026-06-10 1:26 ` Kerin Millar
2026-06-10 1:32 ` Randy Bush
2026-06-10 1:38 ` Kerin Millar
2026-06-10 16:33 ` Randy Bush [this message]
2026-06-10 16:53 ` Kerin Millar
2026-06-10 17:19 ` Randy Bush
2026-06-10 18:02 ` Kerin Millar
2026-06-10 23:51 ` Sunny73Cr
2026-06-10 23:57 ` Randy Bush
2026-06-11 0:06 ` Sunny73Cr
2026-06-11 0:25 ` Randy Bush
2026-06-11 1:05 ` Kerin Millar
2026-06-11 1:12 ` Randy Bush
2026-06-10 6:20 ` Reindl Harald
2026-06-10 10:09 ` Kerin Millar
2026-06-10 16:01 ` Randy Bush
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