Re: [DNSOP] WGLC for draft-ietf-dnsop-let-localhost-be-localhost-02

Paul Vixie <paul@redbarn.org> Thu, 01 February 2018 17:33 UTC

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Date: Thu, 01 Feb 2018 09:33:37 -0800
From: Paul Vixie <paul@redbarn.org>
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Subject: Re: [DNSOP] WGLC for draft-ietf-dnsop-let-localhost-be-localhost-02
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Andrew Sullivan wrote:
> On Wed, Jan 31, 2018 at 04:15:07PM +0000, Viktor Dukhovni wrote:
>> return NXDomain is likely the best option for now.  The other
>> alternative is to actually serve the expected data:
>>
>>      localhost. IN A 127.0.0.1
>>      localhost. IN AAAA ::1
>>
>> but I don't think that'd be better.
>
> It has the notable advantage that it's what the RFC says to do.

while i would separately be happy to outlaw queries for this name by 
resolvers, i agree that actually serving and signing the data would meet 
the standard of "reasonable expectations", and ought to be debated.

as to the first, i harken again to RFC 1535, which advises implementers 
of host stub resolver libraries, but which adds or subtracts or modifies 
no on-the-wire patterns. that's how bad behaviour is managed, and not by 
mandating that my local RDNS server not answer for localhost.

-- 
P Vixie