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Date:      Thu, 27 Feb 2020 10:31:59 +0100
From:      Kurt Jaeger <pi@freebsd.org>
To:        "Herbert J. Skuhra" <herbert@gojira.at>
Cc:        current@freebsd.org, Michael Butler <imb@protected-networks.net>
Subject:   Re: lame reverse DNS?
Message-ID:  <20200227093159.GS37073@home.opsec.eu>
In-Reply-To: <8736axm50b.wl-herbert@gojira.at>
References:  <db42c2a5-f42e-ee4a-5cf8-0136e0867105@protected-networks.net> <8736axm50b.wl-herbert@gojira.at>

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Hi!

> The problem has been resolved but I still sometimes see "connect from
> unknown[2610:1c1:1:606c::19:2]" in the maillog (today: 6 of 131
> connections). Local unbound issue?

That IPv6 has a valid reverse DNS record, so please try to investigate.

Something like the output from:

dig +trace -t ptr 2.0.0.0.9.1.0.0.0.0.0.0.0.0.0.0.c.6.0.6.1.0.0.0.1.c.1.0.0.1.6.2.ip6.arpa

-- 
pi@opsec.eu            +49 171 3101372                    Now what ?



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