From owner-freebsd-questions Thu Jan 31 21:25:54 2002 Delivered-To: freebsd-questions@freebsd.org Received: from avocet.prod.itd.earthlink.net (avocet.mail.pas.earthlink.net [207.217.120.50]) by hub.freebsd.org (Postfix) with ESMTP id F1FC837B416 for ; Thu, 31 Jan 2002 21:25:47 -0800 (PST) Received: from user-33qtmu3.dsl.mindspring.com ([199.174.219.195] helo=gohan.cjclark.org) by avocet.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 16WWCm-0001At-00; Thu, 31 Jan 2002 21:25:46 -0800 Received: (from cjc@localhost) by gohan.cjclark.org (8.11.6/8.11.1) id g115PNQ82176; Thu, 31 Jan 2002 21:25:23 -0800 (PST) (envelope-from cjc) Date: Thu, 31 Jan 2002 21:25:21 -0800 From: "Crist J. Clark" To: Alex Toushek Cc: freebsd-questions@FreeBSD.ORG Subject: Re: DNS Reverse Message-ID: <20020131212521.H152@gohan.cjclark.org> Reply-To: cjclark@alum.mit.edu References: <9768EC34F9F5E44AB692F96C07562E1A015ED5@lemonjello.cangen> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <9768EC34F9F5E44AB692F96C07562E1A015ED5@lemonjello.cangen>; from toushek@canadiangeneral.com on Wed, Jan 30, 2002 at 09:09:58PM -0500 X-URL: http://people.freebsd.org/~cjc/ Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Wed, Jan 30, 2002 at 09:09:58PM -0500, Alex Toushek wrote: > I have 2 upstream providers, 1 I know I have reverse authority over my IP > blocks. The other one says I do but I am doubtful. I am runing bind 9 with > FreeBSD 4.1 on my DNS server. I have a class c from the one upstream with > the working reverse records and a /27 from the other with out the working > reverse records. How can I confirm that I am setup correctly. This is > driving me nuts and I am getting a lot of rejected mail from my hosts > because it cannot resolve the IP correctly to the domain? Start at the root servers and look up the first level of your IN-ADDR.ARPA domain. Using the servers listed as authoritive for that domain, lookup the next level. Repeat until you do or do not reach your own DNS server. An example using my current IP, 199.174.219.195, $ dig @a.root-servers.net 199.in-addr.arpa ... From the output, $ dig @dill.arin.net 174.199.in-addr.arpa ... etc. This a way to be _sure_ of what the rest of the world sees as authorative for your domain. -- Crist J. Clark | cjclark@alum.mit.edu | cjclark@jhu.edu http://people.freebsd.org/~cjc/ | cjc@freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message