From owner-freebsd-questions@FreeBSD.ORG Sat Feb 28 11:20:55 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0B598106566B for ; Sat, 28 Feb 2009 11:20:55 +0000 (UTC) (envelope-from freebsd@optimis.net) Received: from mail.optimis.net (mail.optimis.net [69.104.191.124]) by mx1.freebsd.org (Postfix) with ESMTP id 7A89E8FC14 for ; Sat, 28 Feb 2009 11:20:54 +0000 (UTC) (envelope-from freebsd@optimis.net) Received: from marvin.optimis.net (marvin.optimis.net [192.168.1.3]) by mail.optimis.net (8.14.2/8.14.2) with ESMTP id n1SAsDNa033185; Sat, 28 Feb 2009 02:54:13 -0800 (PST) (envelope-from freebsd@optimis.net) Received: from marvin.optimis.net (localhost [127.0.0.1]) by marvin.optimis.net (8.14.2/8.14.2) with ESMTP id n1SAsDRY033360; Sat, 28 Feb 2009 02:54:13 -0800 (PST) (envelope-from freebsd@optimis.net) Received: (from george@localhost) by marvin.optimis.net (8.14.2/8.14.2/Submit) id n1SAsDBS033359; Sat, 28 Feb 2009 02:54:13 -0800 (PST) (envelope-from freebsd@optimis.net) Date: Sat, 28 Feb 2009 02:54:13 -0800 From: George Davidovich To: freebsd-questions@freebsd.org Message-ID: <20090228105413.GB32023@marvin.optimis.net> References: <20090228161606.N71460@sola.nimnet.asn.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090228161606.N71460@sola.nimnet.asn.au> User-Agent: Mutt/1.5.18 (2008-05-17) Cc: Ian Smith Subject: Re: Odd DNS requests X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 28 Feb 2009 11:20:55 -0000 On Sat, Feb 28, 2009 at 04:32:47PM +1100, Ian Smith wrote: > Recently we've had a Mac notebook of some sort on our LAN, that likes > to make these DNS queries from time to time, to no avail, as noticed > on a filtering bridge between the LAN and the router+DNS at > 192.168.0.1: > > 16:13:05.020397 192.168.0.59.53207 > 192.168.0.1.53: 63162+ PTR? b._dns-sd._udp.0.0.168.192.in-addr.arpa. (57) [tos 0x18] > 16:13:05.021093 192.168.0.1.53 > 192.168.0.59.53207: 63162 NXDomain* 0/1/0 (128) (DF) > 16:13:05.215790 192.168.0.59.64633 > 192.168.0.1.53: 61059+ PTR? db._dns-sd._udp.0.0.168.192.in-addr.arpa. (58) [tos 0x18] > 16:13:05.216469 192.168.0.1.53 > 192.168.0.59.64633: 61059 NXDomain* 0/1/0 (129) (DF) > 16:13:05.226242 192.168.0.59.61635 > 192.168.0.1.53: 6749+ PTR? r._dns-sd._udp.0.0.168.192.in-addr.arpa. (57) [tos 0x18] > 16:13:05.226789 192.168.0.1.53 > 192.168.0.59.61635: 6749 NXDomain* 0/1/0 (128) (DF) > 16:13:05.237319 192.168.0.59.56300 > 192.168.0.1.53: 21450+ PTR? dr._dns-sd._udp.0.0.168.192.in-addr.arpa. (58) [tos 0x18] > 16:13:05.237842 192.168.0.1.53 > 192.168.0.59.56300: 21450 NXDomain* 0/1/0 (129) (DF) > 16:13:05.248440 192.168.0.59.60806 > 192.168.0.1.53: 10032+ PTR? lb._dns-sd._udp.0.0.168.192.in-addr.arpa. (58) [tos 0x18] > 16:13:05.249252 192.168.0.1.53 > 192.168.0.59.60806: 10032 NXDomain* 0/1/0 (129) (DF) > > What exactly are these hoping to discover, and what needs turning off > in the Mac's setup (OSX, most likely a recent version) to quell them? DNS-Based Service Discovery: Skip to the section titled: 12. Discovery of Browsing and Registration Domains (Domain Enumeration)' when it gets boring. There may be something more recent or more authoritative, but that's what I have bookmarked. As for configuring the notebook, etc., perhaps someone else can chime in. -- George