From owner-freebsd-ports-bugs@freebsd.org Thu Jan 19 17:23:18 2017 Return-Path: Delivered-To: freebsd-ports-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id CCB3FCB54F9 for ; Thu, 19 Jan 2017 17:23:18 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id B228E10F8 for ; Thu, 19 Jan 2017 17:23:18 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id v0JHNIUV046689 for ; Thu, 19 Jan 2017 17:23:18 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-ports-bugs@FreeBSD.org Subject: [Bug 216260] dns/djbdns: loop detection false positives. Date: Thu, 19 Jan 2017 17:23:18 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Ports & Packages X-Bugzilla-Component: Individual Port(s) X-Bugzilla-Version: Latest X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: tjd-freebsd@phlegethon.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: lx@FreeBSD.org X-Bugzilla-Flags: maintainer-feedback? X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter flagtypes.name attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-ports-bugs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Ports bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Jan 2017 17:23:18 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216260 Bug ID: 216260 Summary: dns/djbdns: loop detection false positives. Product: Ports & Packages Version: Latest Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: Individual Port(s) Assignee: lx@FreeBSD.org Reporter: tjd-freebsd@phlegethon.org Flags: maintainer-feedback?(lx@FreeBSD.org) Assignee: lx@FreeBSD.org Created attachment 179072 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D179072&action= =3Dedit Patch to bump loop detection limit from 100 to 500. djbdns will give up resolving a name after 100 queries, to avoid following CNAME loops forever. But 'modern' CDNs use complex layers of DNS redirecti= on that can hit this limit when resolving a valid query from a cold cache.=20 I found that resolving the Let's Encrypt OCSP responder (ocsp.int-x3.letsencrypt.org.) through dnscache would fail and time out.=20 The attached patch bumps the limit from 100 to 500, and makes that particul= ar name resolve again on my system (10.3-RELEASE-p11 amd64, djbdns-ipv6-1.05.b23_21,1 with IP6 config enabled). I searched a bit and it looks like this is a known issue, WONTFIX'd upstrea= m. --=20 You are receiving this mail because: You are the assignee for the bug.=