Date: Thu, 27 Feb 2020 16:56:55 +0100 From: "Herbert J. Skuhra" <herbert@gojira.at> To: current@freebsd.org Subject: Re: lame reverse DNS? Message-ID: <20200227155655.GA1730@mail.bsd4all.net> In-Reply-To: <20200227093159.GS37073@home.opsec.eu> References: <db42c2a5-f42e-ee4a-5cf8-0136e0867105@protected-networks.net> <8736axm50b.wl-herbert@gojira.at> <20200227093159.GS37073@home.opsec.eu>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, Feb 27, 2020 at 10:31:59AM +0100, Kurt Jaeger wrote: > 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. Yes, I know. Otherwise it would fail permanently. - Postfix sends two standard queries (PTR) to local unbound within 5 seconds (05:51:23 and 05:51:28) - Unbound sends multiple queries to 2610:1c0::1104 and 2610:1c0::1204 without receiving a reply (05:51:23 - 05:51:41) - Unbound replies twice with Server failure (05:51:53) I have this issue only with [2610:1c1:1:606c::19:2]: # grep " connect from unknown" /var/log/maillog Feb 27 03:37:53 mail postfix/smtpd[93921]: connect from unknown[2610:1c1:1:606c::19:2] Feb 27 08:40:27 mail postfix/smtpd[33354]: connect from unknown[2610:1c1:1:606c::19:2] Feb 27 09:43:39 mail postfix/smtpd[41982]: connect from unknown[2610:1c1:1:606c::19:2] Feb 27 10:53:38 mail postfix/smtpd[4960]: connect from unknown[2610:1c1:1:606c::19:2] Feb 27 15:30:28 mail postfix/smtpd[87816]: connect from unknown[2610:1c1:1:606c::19:2] Feb 27 15:50:30 mail postfix/smtpd[98816]: connect from unknown[2610:1c1:1:606c::19:2] I've already set cache-min-ttl to 3600. FreeBSD.org uses ttl=60. Why? I'll try to set do-ip6=no. Meanwhile I've whitelisted the IPv6 address in postfix. -- Herbert
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20200227155655.GA1730>