From owner-freebsd-net@FreeBSD.ORG Thu Aug 24 22:21:51 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E833C16A4DE for ; Thu, 24 Aug 2006 22:21:51 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.183]) by mx1.FreeBSD.org (Postfix) with ESMTP id E90B943D60 for ; Thu, 24 Aug 2006 22:21:47 +0000 (GMT) (envelope-from cswiger@mac.com) Received: from mac.com (smtpin04-en2 [10.13.10.149]) by smtpout.mac.com (Xserve/8.12.11/smtpout13/MantshX 4.0) with ESMTP id k7OMLlFE001422; Thu, 24 Aug 2006 15:21:47 -0700 (PDT) Received: from [17.214.14.142] (a17-214-14-142.apple.com [17.214.14.142]) (authenticated bits=0) by mac.com (Xserve/smtpin04/MantshX 4.0) with ESMTP id k7OMLgTG021014; Thu, 24 Aug 2006 15:21:44 -0700 (PDT) In-Reply-To: <44EE23E7.2010800@shapeshifter.se> References: <44EE1E48.6000006@shapeshifter.se> <44EE23E7.2010800@shapeshifter.se> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Chuck Swiger Date: Thu, 24 Aug 2006 15:21:41 -0700 To: Fredrik Lindberg X-Mailer: Apple Mail (2.752.2) X-Brightmail-Tracker: AAAAAQAAA+k= X-Language-Identified: TRUE Cc: freebsd-net@freebsd.org Subject: Re: Zeroconfig and Multicast DNS 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: Thu, 24 Aug 2006 22:21:52 -0000 On Aug 24, 2006, at 3:10 PM, Fredrik Lindberg wrote: >> Queries to 254.169.in-addr.arpa MUST return NXDOMAIN (or RCODE 3, >> to choose a non-BIND specific term). > > We're talking about mDNS here, not DNS. I would argue that because > mDNS is link-local it makes perfect sense to be able to resolve > 254.169.in-addr.arpa using mDNS. True, agreed-- that's in part (b) of what I quoted. The specific part is: "Names that are resolvable only on the local link (such as through use of protocols such as Link Local Multicast Name Resolution [LLMNR]) MUST NOT be used in off-link communication." What this means is that the hostname-to-address mapping for 254.169.in-addr.arpa addresses must be unique per interface. If you have two interfaces which are connected to different LLA subnets, 169.254.1.1 might map to hostnameA on one, and that same IP might be hostnameB on the other. -- -Chuck