Re: [Doh] DNS64 and DOH

Lee Howard <lee@asgard.org> Mon, 19 March 2018 13:49 UTC

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To: Stephane Bortzmeyer <bortzmeyer@nic.fr>, Erik Nygren <erik+ietf@nygren.org>
Cc: doh@ietf.org, Jordi Palet Martinez <jordi.palet@consulintel.es>
References: <CAKC-DJjtHE89A=vG5iS_0M_jqnWusDUDnwyernd+FC1VxxmU5Q@mail.gmail.com> <20180319090048.GB16151@laperouse.bortzmeyer.org>
From: Lee Howard <lee@asgard.org>
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Date: Mon, 19 Mar 2018 13:49:04 +0000
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Subject: Re: [Doh] DNS64 and DOH
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On 03/19/2018 09:00 AM, Stephane Bortzmeyer wrote:
> On Sun, Mar 18, 2018 at 07:20:35PM +0000,
>   Erik Nygren <erik+ietf@nygren.org> wrote
>   a message of 86 lines which said:
>
>> At least for mobile, not using DNS64 synthesis in the client will
>> likely result in this either breaking the client in NAT64
>> environments
> Is it a DNS64-specific problem? It could also happen if you have
> local-only domain names, dummy local TLDs, alternative roots,
> split-horizon, CDN, geo-based answers, or other DNS tricks.
>
> Yesterday, one IETFer told me that DoH was a bad idea because it allows
> people to avoid DNS-based national censorship…
>
> May be a warning "the DoH resolver may give you a different answer
> from what you would have got from the usual resolver"?
Well, in the mobile NAT64 case, "a different answer" will be "an 
unusable answer," wouldn't it?

Lee