Date: Thu, 27 Feb 2020 10:18:20 -0800 From: Chris <bsd-lists@BSDforge.com> To: freebsd-current <freebsd-current@freebsd.org> Subject: Re: lame reverse DNS? Message-ID: <479c542c953ec5d9edf96ea1d33940c3@udns.ultimatedns.net> In-Reply-To: <20200227155655.GA1730@mail.bsd4all.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Thu, 27 Feb 2020 16:56:55 +0100 Herbert J=2E Skuhra herbert@gojira=2Eat said > On Thu, Feb 27, 2020 at 10:31:59AM +0100, Kurt Jaeger wrote: > > Hi! > >=20 > > > 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)=2E Local unbound issue? > >=20 > > That IPv6 has a valid reverse DNS record, so please try to investigate=2E >=20 > Yes, I know=2E Otherwise it would fail permanently=2E >=20 > - 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) >=20 > I have this issue only with [2610:1c1:1:606c::19:2]: >=20 > # 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] >=20 > I've already set cache-min-ttl to 3600=2E FreeBSD=2Eorg uses ttl=3D60=2E Why? > I'll try to set do-ip6=3Dno=2E Meanwhile I've whitelisted the IPv6 address > in postfix=2E=20 >=20 FWIW I thought I might chime in here to report that I'm also seeing *periodic* failures=2E IOW lookups fail, but aren't *completely* fatal=2E :) --Chris FreeBSD 14=2E0-FUTURE #0=2E000 cray256 > --=20 > Herbert > _______________________________________________ > freebsd-current@freebsd=2Eorg mailing list > https://lists=2Efreebsd=2Eorg/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd=2Eorg= "
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?479c542c953ec5d9edf96ea1d33940c3>