From owner-freebsd-net@FreeBSD.ORG Wed Feb 13 02:46:45 2008 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BC51216A468; Wed, 13 Feb 2008 02:46:45 +0000 (UTC) (envelope-from edwin@mavetju.org) Received: from mail5out.barnet.com.au (mail5.barnet.com.au [202.83.178.78]) by mx1.freebsd.org (Postfix) with ESMTP id 8010113C4E9; Wed, 13 Feb 2008 02:46:45 +0000 (UTC) (envelope-from edwin@mavetju.org) Received: by mail5out.barnet.com.au (Postfix, from userid 1001) id 77AD02218828; Wed, 13 Feb 2008 13:46:44 +1100 (EST) X-Viruscan-Id: <47B25A140000BD40B14EF3@BarNet> Received: from mail5auth.barnet.com.au (mail5.barnet.com.au [202.83.178.78]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail5auth.barnet.com.au", Issuer "*.barnet.com.au" (verified OK)) by mail5.barnet.com.au (Postfix) with ESMTP id 25BD721B1897; Wed, 13 Feb 2008 13:46:44 +1100 (EST) Received: from k7.mavetju (k7.mavetju.org [10.251.1.18]) by mail5auth.barnet.com.au (Postfix) with ESMTP id C4B0D2218803; Wed, 13 Feb 2008 13:46:43 +1100 (EST) Received: by k7.mavetju (Postfix, from userid 1001) id 1838D2C8; Wed, 13 Feb 2008 13:46:43 +1100 (EST) Date: Wed, 13 Feb 2008 13:46:43 +1100 From: Edwin Groothuis To: d@delphij.net Message-ID: <20080213024643.GB3957@k7.mavetju> References: <47B2488D.70707@delphij.net> <20080213015144.GA3957@k7.mavetju> <47B2591D.4000703@delphij.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47B2591D.4000703@delphij.net> User-Agent: Mutt/1.4.2.3i Cc: freebsd-net@freebsd.org, ume@FreeBSD.org Subject: Re: Strange resolver behavior X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Feb 2008 02:46:45 -0000 On Tue, Feb 12, 2008 at 06:42:37PM -0800, Xin LI wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Edwin Groothuis wrote: > > On Tue, Feb 12, 2008 at 05:31:57PM -0800, Xin LI wrote: > >> Received 127 bytes from 127.0.0.1#53 in 0 ms > >> [delphij@charlie] ~> host ps_other.a.shifen.com > >> ps_other.a.shifen.com has address 202.108.22.46 > >> Host ps_other.a.shifen.com not found: 3(NXDOMAIN) > > > > 12:49:45.620015 IP 10.251.1.18.51852 > 202.108.22.102.53: 18450 MX? ps_other.a.shifen.com. (39) > > 12:49:46.086227 IP 202.108.22.102.53 > 10.251.1.18.51852: 18450 NotImp*- 0/0/0 (39) > > > > That's the one it is complaining about, not about the hostname > > itself. > > > > Yes, the warning/error message could be a little bit smarter. > > Em... That's fine I think, it does not seem to be the MX to cause the > problem, though. I have tried to visit 'dict.baidu.com' in Firefox and > it told me that the name can not resolve. tcpdump indicates that the > server has respond the A RR but resolver still queries AAAA... Yes, but it is the MX record querying it is complaining about. Edwin -- Edwin Groothuis | Personal website: http://www.mavetju.org edwin@mavetju.org | Weblog: http://www.mavetju.org/weblog/