Re: [DNSOP] Terminology question: split DNS

Bob Harold <rharolde@umich.edu> Mon, 19 March 2018 18:05 UTC

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From: Bob Harold <rharolde@umich.edu>
Date: Mon, 19 Mar 2018 14:05:45 -0400
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To: Artyom Gavrichenkov <ximaera@gmail.com>
Cc: Paul Hoffman <paul.hoffman@vpnc.org>, dnsop <dnsop@ietf.org>
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Subject: Re: [DNSOP] Terminology question: split DNS
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On Mon, Mar 19, 2018 at 2:00 PM, Artyom Gavrichenkov <ximaera@gmail.com>;
wrote:

> On Mon, Mar 19, 2018 at 5:47 PM, Paul Hoffman <paul.hoffman@vpnc.org>;
> wrote:
> > [..] the basic point is that the
> >    correspondence between a given FQDN (fully qualified domain name) and
> a
> >    given IPv4 address is no longer universal and stable over long
> periods."
>
> IP v. being whatever, 4 or 6, there's a bunch of reasons there's
> virtually no correspondence between a given FQDN and a given IP
> address nowadays. E.g. CDNs.
>
>
>
I think the key part is:
   "different answers depending on the source of the query."

In practice this is done by using either different DNS servers (or
processes), or multiple "views" in a DNS configuration.
(Is "view" in BIND called something else in other software?)

-- 
Bob Harold