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Re: [DNSOP] Any website publishers who use CDNs on the list?

Paul Vixie <paul@redbarn.org> Wed, 07 November 2018 18:07 UTC

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Date: Wed, 07 Nov 2018 10:07:04 -0800
From: Paul Vixie <paul@redbarn.org>
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To: Tony Finch <dot@dotat.at>
CC: Vladimír Čunát <vladimir.cunat+ietf@nic.cz>, Matthew Pounsett <matt@conundrum.com>, dnsop <dnsop@ietf.org>
References: <CCEEBCEF-FE91-49A6-96FE-122A5E025159@isoc.org> <20181102121108.GE12840@besserwisser.org> <20181102211625.GB20885@besserwisser.org> <20181102214114.GA92689@isc.org> <5eb5e946-88e7-59f2-1a7d-1eec3e606b9b@nic.cz> <CAAiTEH8_K=h+A0PqTh785a0tNxWhDg_Uu1UDOWb0QTJyyO2eag@mail.gmail.com> <ed4f4b57-ac02-a983-ae59-db5af9b78b96@nic.cz> <alpine.DEB.2.20.1811071732040.4343@grey.csi.cam.ac.uk>
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Subject: Re: [DNSOP] Any website publishers who use CDNs on the list?
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Tony Finch wrote:
> ...
>
> And even if you can get the recursive server addresses, you should still
> go through the name service switch to deal with names that aren't in the
> DNS.

agreed.

>
> The custom DNS stub resolvers that I know about (adns, ldns, libevent)
> reimplement the libc resolver, with their own parsers for /etc/resolv.conf
> and all the rest.

dns requests should almost universally go out via the open source 
"getdns" API (https://getdnsapi.net/) at this point. if your code uses 
one of the above methods, or getXbyY() in any form, please investigate.

-- 
P Vixie

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