From owner-freebsd-questions@FreeBSD.ORG Mon Sep 27 08:03:02 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E349A16A4CE for ; Mon, 27 Sep 2004 08:03:02 +0000 (GMT) Received: from lv.raad.tartu.ee (lv.raad.tartu.ee [194.126.106.110]) by mx1.FreeBSD.org (Postfix) with ESMTP id B9EC743D1F for ; Mon, 27 Sep 2004 08:03:00 +0000 (GMT) (envelope-from toomas.aas@raad.tartu.ee) Received: Message by Barricade lv.raad.tartu.ee with ESMTP id i8R82xWQ013931 for ; Mon, 27 Sep 2004 11:02:59 +0300 Message-Id: <200409270802.i8R82xWQ013931@lv.raad.tartu.ee> Received: from INFO/SpoolDir by raad.tartu.ee (Mercury 1.48); 27 Sep 04 11:02:59 +0300 Received: from SpoolDir by INFO (Mercury 1.48); 27 Sep 04 11:02:57 +0300 From: "Toomas Aas" Organization: Tartu City Government To: freebsd-questions@freebsd.org Date: Mon, 27 Sep 2004 11:02:47 +0300 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Priority: normal In-reply-to: <20040926143211.02d40949.wmoran@potentialtech.com> References: <493F1EDF-0FE0-11D9-A586-000D9333E43C@secure-computing.net> Subject: Re: Backup Mail Server Questions X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 27 Sep 2004 08:03:03 -0000 > From: Bill Moran > First off, what does setting up backup DNS/mail gain the end user? Unless > you have mirrors on radically different networks, of things like WWW and > mail, backup DNS doesn't really accomplish anything. If the net > connection goes down, you're offline anyway, so who cares if DNS still > works? This is only true if your DNS server is behind the same network connection with your other services. We recently had a situation where one of our mail sub-domains and one pretty important web application were out of operation FOR A MONTH because the external contractor who handles DNS for this sub-domain had "forgotten" their DNS server into another network and it was disconnected. Until they sorted out the mess, from the end-users POV things basically didn't work, even though the mail and web servers themselves were fine. So, secondary DNS *is important*. It is also very easy to set up (at least with BIND). -- Toomas Aas | toomas.aas@raad.tartu.ee | http://www.raad.tartu.ee/~toomas/ * I haven't lost my mind; I know exactly where I left it.