Date: Mon, 27 Sep 2004 11:02:47 +0300 From: "Toomas Aas" <toomas.aas@raad.tartu.ee> To: freebsd-questions@freebsd.org Subject: Re: Backup Mail Server Questions Message-ID: <200409270802.i8R82xWQ013931@lv.raad.tartu.ee> In-Reply-To: <20040926143211.02d40949.wmoran@potentialtech.com> References: <493F1EDF-0FE0-11D9-A586-000D9333E43C@secure-computing.net>
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> From: Bill Moran <wmoran@potentialtech.com> > 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.
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