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Re: [DNSOP] fyi [Pdns-users] Please test: ALIAS/ANAME apex record in PowerDNS

Tony Finch <dot@dotat.at> Mon, 22 September 2014 14:12 UTC

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Date: Mon, 22 Sep 2014 15:06:02 +0100
From: Tony Finch <dot@dotat.at>
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References: <20140921115222.GB16178@xs.powerdns.com> <541F1AE8.6010709@redbarn.org> <CAAF6GDdttYNDBDSROiHSGkkvRZ5Pxfm0W_d68x=POXgU_SsYOg@mail.gmail.com> <541F569D.9040508@redbarn.org> <20140922132131.GA98041@mx1.yitter.info>
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Subject: Re: [DNSOP] fyi [Pdns-users] Please test: ALIAS/ANAME apex record in PowerDNS
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Andrew Sullivan <ajs@anvilwalrusden.com> wrote:
> On Sun, Sep 21, 2014 at 03:52:13PM -0700, Paul Vixie wrote:
>
> > if it caches, does it implement "client subnet"?
>
> It sort of has to, not that it will necessarily be useful.  An
> important use case is CDNs, and since you probably want to do stupid
> DNS tricks based on the source of the query, you better do client
> subnet with it.  (Of course, statistically speaking right now that
> means, "Works for Google and OpenDNS and not really anyone else.")

The fun bit is that an auth server implementing some kind of proxying
ANAME is in a position very like Google and OpenDNS. That is, if the
target of the ANAME is a hostname provided by Akamai or CloudFlare or
whoever, and if the auth server is going to proxy the answer faithfully,
then it has to implement client-subnet.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
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