Re: [DNSOP] Status of "let localhost be localhost"?

Joe Abley <> Wed, 02 August 2017 13:34 UTC

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From: Joe Abley <>
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Date: Wed, 2 Aug 2017 14:34:15 +0100
Cc: Mark Andrews <>, dnsop WG <>, Jacob Hoffman-Andrews <>
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To: Mike West <>
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Subject: Re: [DNSOP] Status of "let localhost be localhost"?
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Hi Mike,

On Aug 2, 2017, at 09:54, Mike West <> wrote:

> What would you like to see in the document in order to address this concern? A requirement that a `localhost` zone be created and delegated as an insecure delegation, using some of the language from the draft above (e.g. "This delegation MUST NOT be signed, MUST NOT include a DS record, and MUST point to one or more black hole servers, for example '' and ''.")?

Any such delegation would be lame, and is a bad idea just for that reason. There's no foolproof way to add or drop zones hosted on the whole AS112 server ssystem due to the lack of coordination between AS112 node operators -- despite the good communication between many such operators, there's no good way to tell what nodes you don't know about.

If you really wanted to sink queries in the top-level domain LOCALHOST a better approach would to use DNAME (see RFC 7535). But note that I'm not expressing an opinion on whether that's a good idea, either philosophically or practically, in this specific example.