From owner-freebsd-questions@FreeBSD.ORG Mon Jul 16 06:08:11 2007 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 0DC6E16A402 for ; Mon, 16 Jul 2007 06:08:11 +0000 (UTC) (envelope-from on@cs.ait.ac.th) Received: from mail.cs.ait.ac.th (mail.cs.ait.ac.th [192.41.170.16]) by mx1.freebsd.org (Postfix) with ESMTP id 54A5D13C471 for ; Mon, 16 Jul 2007 06:08:09 +0000 (UTC) (envelope-from on@cs.ait.ac.th) Received: from banyan.cs.ait.ac.th (banyan.cs.ait.ac.th [192.41.170.5]) by mail.cs.ait.ac.th (8.13.1/8.12.11) with ESMTP id l6G67vWH006690 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 16 Jul 2007 13:07:57 +0700 (ICT) Received: (from on@localhost) by banyan.cs.ait.ac.th (8.13.3/8.12.11) id l6G67tod005252; Mon, 16 Jul 2007 13:07:55 +0700 (ICT) Date: Mon, 16 Jul 2007 13:07:55 +0700 (ICT) Message-Id: <200707160607.l6G67tod005252@banyan.cs.ait.ac.th> From: Olivier Nicole To: cswiger@mac.com In-reply-to: <157815A5-2619-4457-85B0-40941C58C284@mac.com> (message from Chuck Swiger on Fri, 13 Jul 2007 10:13:03 -0700) References: <46970917.3030502@fpt.vn> <200707130536.l6D5akxS070187@banyan.cs.ait.ac.th> <157815A5-2619-4457-85B0-40941C58C284@mac.com> X-Virus-Scanned: on CSIM by amavisd-milter (http://www.amavis.org/) Cc: freebsd-questions@freebsd.org, cuongvt@fpt.vn Subject: Re: is is able to setting up DNS server reverse lookup with DynamicIP? 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: Mon, 16 Jul 2007 06:08:11 -0000 > >> I'm using dynamicDNS, so I will able to specify the forward *AND* > >> reverse lookups? > > > > Yes. > > No, nobody else is going to see the results your local nameserver > sends since it isn't authoritative for the domains, and the > delegation for the IP block isn't going to point to your server but > to the actual nameserver. Take a look at what happens when someone > using an external nameserver does the same queries: For the example I gave, I am of course authoritative. > Notice the NXDOMAIN response...? Stange, because I don't get such response, even when querying from germany to my domain in Thailand. (Could have been a matter of time of day, Friday 22:00 is busy time in Thailand, the DNS may have been hard to reach). > The answer everyone else gets, VAIO.desktops.cs.ait.ac.th, doesn't > match alrw17.desktops.cs.ait.ac.th, so a double-reverse lookup check > would fail. It could have been a cache issue? Same thing I get correct answer for a request made from Germany to that Thai domain. Best regards, Olivier