Date: Tue, 17 Jun 2003 23:29:13 -0600 From: Gary Aitken <freebsd@dreamchaser.org> To: Scott Kupferschmidt <sk@isprime.com> Cc: freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: Two DNS servers with one IP address Message-ID: <3EEFF8A9.9010808@dreamchaser.org> References: <Pine.BSF.4.21.0306172253470.24634-100000@lexus.isprime.com>
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I think you're missing the reasoning behind the 2 dns servers requirement, and the consequences if they are both down. One of the reasons for separate servers is that it allows the rest of the world to continue business dealings with your domain even when it is down, to some extent. For example, mail can be sent if the mx record can be retrieved from a dns server. The mail will be queued and delivered when the mail host comes back up. If there isn't a good dns server around, the destination won't resolve and the mail will bounce. From the sender's perspective, this looks like your organization has died, rather than had a temporary outage. That's why you want your secondary well isolated, preferably a long distance away, from your primary. Scott Kupferschmidt wrote: Hello, It certainly is possible to register two nameservers with the same IP address. While it serves no real purpose to do so, if you require 2 NS's then you can. Check with your registrar. We do that here on our virtual servers just because it's easier and really, if the server goes down, that's it. No point in having the DNS up if the entire server is down for us. The exception to the rule is where we have other NS's for everything else that is redundant, especially for dedicated customers. Hope this helps out. Sincerely, Scott Kupferschmidt ISPrime, Inc. 866.502.4678 ext. 3 AIM: Scott ISPrime - ICQ: 174337249 On Tue, 17 Jun 2003, Alfonso Romero wrote: Well, I wondered if it could be possible to have a primary and a secondary nameserver with only one public IP address, sort of like virtual domains on apache... ----- Original Message ----- From: "Kirk Strauser" [1]<kirk@strauser.com> To: [2]<freebsd-questions@freebsd.org> Sent: Tuesday, June 17, 2003 9:21 PM Subject: Re: Two DNS servers with one IP address At 2003-06-18T01:52:42Z, Alfonso Romero [3]<ibac@prodigy.net.mx> writes: Is it possible to have two DNS servers with only one public IP address? What would be the point? Put another way: what are you trying to achieve? -- Kirk Strauser In Googlis non est, ergo non est. _______________________________________________ [4]freebsd-questions@freebsd.org mailing list [5]http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [6]"freebsd-questions-unsubscribe@freebsd.org" _______________________________________________ [7]freebsd-questions@freebsd.org mailing list [8]http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [9]"freebsd-questions-unsubscribe@freebsd.org" References 1. mailto:kirk@strauser.com 2. mailto:freebsd-questions@freebsd.org 3. mailto:ibac@prodigy.net.mx 4. mailto:freebsd-questions@freebsd.org 5. http://lists.freebsd.org/mailman/listinfo/freebsd-questions 6. mailto:freebsd-questions-unsubscribe@freebsd.org 7. mailto:freebsd-questions@freebsd.org 8. http://lists.freebsd.org/mailman/listinfo/freebsd-questions 9. mailto:freebsd-questions-unsubscribe@freebsd.org
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