From owner-freebsd-hackers@FreeBSD.ORG Sun Jan 25 10:51:41 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A3C8816A4CE for ; Sun, 25 Jan 2004 10:51:41 -0800 (PST) Received: from relay.pair.com (relay.pair.com [209.68.1.20]) by mx1.FreeBSD.org (Postfix) with SMTP id 610D643D1F for ; Sun, 25 Jan 2004 10:51:40 -0800 (PST) (envelope-from silby@silby.com) Received: (qmail 83560 invoked from network); 25 Jan 2004 18:51:39 -0000 Received: from niwun.pair.com (HELO localhost) (209.68.2.70) by relay.pair.com with SMTP; 25 Jan 2004 18:51:39 -0000 X-pair-Authenticated: 209.68.2.70 Date: Sun, 25 Jan 2004 12:51:37 -0600 (CST) From: Mike Silbersack To: Dan Langille In-Reply-To: <4013A11B.30806.3972D018@localhost> Message-ID: <20040125124825.D873@odysseus.silby.com> References: <4013A11B.30806.3972D018@localhost> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-hackers@freebsd.org Subject: Re: problems resolving bsdcan.org? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Jan 2004 18:51:41 -0000 On Sun, 25 Jan 2004, Dan Langille wrote: > I've had reports of people not being able to resolve hostnames for > bsdcan.org. I do know that one of the domain's DNS servers is > offline (m20.unixathome.org). But the other (nezlok.unixathome.org) > is up and accepting queries (at least for all my attempts). > I can't see the problem. Can you? > > Thanks. > -- > Dan Langille : http://www.langille.org/ AFAIK, older versions of bind used to not handle the dead server case well at all. Perhaps people are still running older (unpatched), older (patched), or other vendor with the same bug DNS servers. I know this only because it happened to me back in 1999 or so, and was really frustrating (even though I still had 2/3 servers working!) IIRC, these older servers *did* handle the case where they received an icmp unreachable message fine, and just went on to the next machine; could you have another computer take over the dead DNS server's IP and run no services on it? Mike "Silby" Silbersack