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Re: [DNSOP] Call for Adoption: draft-arends-private-use-tld

Brian Dickson <brian.peter.dickson@gmail.com> Mon, 15 June 2020 17:08 UTC

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From: Brian Dickson <brian.peter.dickson@gmail.com>
Date: Mon, 15 Jun 2020 10:08:29 -0700
Message-ID: <CAH1iCiouFfMRYoREwhhTbQfnNserw3RVUPs8Pzc8CvNEhysYCw@mail.gmail.com>
To: Tony Finch <dot@dotat.at>
Cc: Tim Wicinski <tjw.ietf@gmail.com>, dnsop <dnsop@ietf.org>, dnsop-chairs <dnsop-chairs@ietf.org>
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Subject: Re: [DNSOP] Call for Adoption: draft-arends-private-use-tld
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On Mon, Jun 15, 2020 at 8:34 AM Tony Finch <dot@dotat.at> wrote:

> Tim Wicinski <tjw.ietf@gmail.com> writes:
>
> > This starts a Call for Adoption for draft-arends-private-use-tld
>
> I think this is cute / clever, but a very bad idea.
>
> Experience from IPv4 and IPv6 private use areas shows that there will be
> collisions and they will be painful.
>
>
I think the comparison to v4 private use is flawed, specifically because
IPv4 addresses are a fixed quantity.

Private use DNS space is freeform and limited only by the 255 character
limit in DNS names.
Collisions in private use DNS space can trivially be prevented by use of an
in-fix (like a suffix but before the TLD) designed to be unique.
E.g. use an FQDN belonging to you (or your company), so the namespace would
be example.com.zz under which your private names are instantiated.
(That's an example only, any arbitrary string could be used, even a GUID.)

Brian

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