Re: [DNSOP] Any website publishers who use CDNs on the list?
Tony Finch <dot@dotat.at> Wed, 07 November 2018 17:48 UTC
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Date: Wed, 07 Nov 2018 17:48:44 +0000
From: Tony Finch <dot@dotat.at>
To: Vladimír Čunát <vladimir.cunat+ietf@nic.cz>
cc: Matthew Pounsett <matt@conundrum.com>, dnsop <dnsop@ietf.org>
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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>
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Subject: Re: [DNSOP] Any website publishers who use CDNs on the list?
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Vladimír Čunát <vladimir.cunat+ietf@nic.cz> wrote: > On 11/7/18 4:00 PM, Matthew Pounsett wrote: > > Can you point to a major browser that does *not* implement its own > > resolver already? > > I believe Firefox on Linux uses libc call (in my basically default > setup). There's a problem on Unix that there isn't a way to get the recursive server IP addresses from the libc resolver. In the IPv4 era it was often possible to dig around in the _res struct in a moderately portable way, if the libc resolver was derived from BIND, but that was thoroughly broken by the divergence in IPv6 support. 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. 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. Tony. -- f.anthony.n.finch <dot@dotat.at> http://dotat.at/ Shannon: South or southwest 5 to 7, increasing gale 8 at times. Very rough, becoming high. Rain or thundery showers. Moderate or poor.
- [DNSOP] Any website publishers who use CDNs on th… Dan York
- Re: [DNSOP] Any website publishers who use CDNs o… Måns Nilsson
- Re: [DNSOP] Any website publishers who use CDNs o… Måns Nilsson
- Re: [DNSOP] Any website publishers who use CDNs o… Evan Hunt
- Re: [DNSOP] Any website publishers who use CDNs o… Joel Jaeggli
- Re: [DNSOP] Any website publishers who use CDNs o… Vladimír Čunát
- Re: [DNSOP] Any website publishers who use CDNs o… Matthew Pounsett
- Re: [DNSOP] Any website publishers who use CDNs o… Patrick Mevzek
- Re: [DNSOP] Any website publishers who use CDNs o… Vladimír Čunát
- Re: [DNSOP] Any website publishers who use CDNs o… Tony Finch
- Re: [DNSOP] Any website publishers who use CDNs o… Paul Vixie
- Re: [DNSOP] Any website publishers who use CDNs o… Tim Wicinski
- Re: [DNSOP] Any website publishers who use CDNs o… Mark Andrews