From owner-freebsd-questions@FreeBSD.ORG Fri Jul 13 18:56:29 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 7E31916A401 for ; Fri, 13 Jul 2007 18:56:29 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from mail-out3.apple.com (mail-out3.apple.com [17.254.13.22]) by mx1.freebsd.org (Postfix) with ESMTP id 66E9D13C4AC for ; Fri, 13 Jul 2007 18:56:29 +0000 (UTC) (envelope-from cswiger@mac.com) Received: from relay6.apple.com (relay6.apple.com [17.128.113.36]) by mail-out3.apple.com (Postfix) with ESMTP id 2D2E6BA7E15; Fri, 13 Jul 2007 11:56:29 -0700 (PDT) Received: from relay6.apple.com (unknown [127.0.0.1]) by relay6.apple.com (Symantec Mail Security) with ESMTP id 176FC100E4; Fri, 13 Jul 2007 11:56:29 -0700 (PDT) X-AuditID: 11807124-a57b8bb0000007f3-35-4697cadc8894 Received: from [17.214.13.96] (int-si-a.apple.com [17.128.113.41]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by relay6.apple.com (Apple SCV relay) with ESMTP id E262910114; Fri, 13 Jul 2007 11:56:28 -0700 (PDT) In-Reply-To: <4697B9EB.5070907@debtresolve.com> References: <46970917.3030502@fpt.vn> <52742602-950D-4964-B9EA-6E0000A6F8D2@mac.com> <4697B9EB.5070907@debtresolve.com> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Message-Id: <246A0B0B-B20A-4673-875F-C27224248980@mac.com> Content-Transfer-Encoding: 7bit From: Chuck Swiger Date: Fri, 13 Jul 2007 11:56:28 -0700 To: Dan Casey X-Mailer: Apple Mail (2.752.2) X-Brightmail-Tracker: AAAAAA== Cc: "freebsd-questions@FreeBSD. ORG" 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: Fri, 13 Jul 2007 18:56:29 -0000 On Jul 13, 2007, at 10:44 AM, Dan Casey wrote: >>> I'm using dynamicDNS, so I will able to specify the forward *AND* >>> reverse lookups? >> >> No. Reverse lookups are controlled by whoever owns the IP delegation >> for the netblock in question, and they are not going to configure PTR >> records for dynamic IPs. If you want to have reverse lookups you >> control, you'll need to get static IPs. > > Slight correction. To do what you want, you will need to get a static > ip. Then you can request your isp (or whoever owns the ip block) to > setup the PTR record for you. That's not really a correction. :-) If you get a single static IP, for example, normally the ISP or netblock owner will not delegate that, but are willing to setup a PTR record. If you get a larger static netblock, especially a /24 or larger, then your ISP can delegate reverse DNS to nameservers you run, and thus you can set up and change the reverse lookup results at will without needing your ISP to make PTR record changes. See http://www.ietf.org/ rfc/rfc2317.txt about "Classless IN-ADDR.ARPA delegation" for the deal with regard to delegation of smaller netblocks than a /24. -- -Chuck