From owner-freebsd-questions Sat Nov 10 14: 4:32 2001 Delivered-To: freebsd-questions@freebsd.org Received: from topaz.mdcc.cx (topaz.mdcc.cx [212.204.230.141]) by hub.freebsd.org (Postfix) with ESMTP id 6897537B417 for ; Sat, 10 Nov 2001 14:04:29 -0800 (PST) Received: from k7.mavetju.org (topaz.mdcc.cx [212.204.230.141]) by topaz.mdcc.cx (Postfix) with ESMTP id A23852B735; Sat, 10 Nov 2001 23:04:11 +0100 (CET) Received: by k7.mavetju.org (Postfix, from userid 1001) id DD52658E; Sun, 11 Nov 2001 09:03:37 +1100 (EST) Date: Sun, 11 Nov 2001 09:03:37 +1100 From: Edwin Groothuis To: BSD Freak Cc: FreeBSD Questions Subject: Re: Changing a DNS Server IP address but not hostname Message-ID: <20011111090337.J35710@k7.mavetju.org> Mail-Followup-To: Edwin Groothuis , BSD Freak , FreeBSD Questions References: <36f66136de89.36de8936f661@mbox.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <36f66136de89.36de8936f661@mbox.com.au>; from bsd-freak@mbox.com.au on Sun, Nov 11, 2001 at 08:43:42AM +1100 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 Sun, Nov 11, 2001 at 08:43:42AM +1100, BSD Freak wrote: > We host several of our client's domains on our DNS servers. > We are soon going to change our network provider, which will result in > a change of the IP addresses of our DNS servers. The server hostnames > however will remain the same. > > Will we have to redelegate all the domain names we currently > host? Redelegate? Not sure what /you/ mean with it, but for me this is just a quick change in the nameservers for the .com.au/.com/whatever domain. There is only one way to do this correct and that is having both the IP subnets for a short time in which you: - configure your new subnet. - configure your new DNS server on the new subnet. - make sure the new DNS server is running properly. - change the configuration in the nameservers for the .com.au/.com/whatever domains. - check that your new DNS servers are running properly, that all your requests are coming through there. - check that your old DNS servers are not being used anymore - turn the old DNS servers off - get rid of the old subnet. Somewhere in the story, set the TTL of your data back to a short time (i.e. 5 minutes), so that you won't be stuck with stuff in caches. And afterwards, set it back to reasonable times again. Moving a DNS server from one subnet to another one is not something which can be done very easily, because it's a basic infrastructure change which will need to work before you can move the rest of the machines to the new subnet. Edwin -- Edwin Groothuis | Personal website: http://www.MavEtJu.org edwin@mavetju.org | Interested in MUDs? Visit Fatal Dimensions: ------------------+ http://www.FatalDimensions.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message