Re: [DNSOP] RFC7720 and AXFR

Mukund Sivaraman <muks@mukund.org> Sun, 28 October 2018 13:13 UTC

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Date: Sun, 28 Oct 2018 18:43:18 +0530
From: Mukund Sivaraman <muks@mukund.org>
To: "A. Schulze" <sca@andreasschulze.de>
Cc: dnsop <dnsop@ietf.org>
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Subject: Re: [DNSOP] RFC7720 and AXFR
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On Sun, Oct 28, 2018 at 01:32:51PM +0100, A. Schulze wrote:
> Hello,
> 
> RFC 2870 (Root Name Server Operational Requirements) say
> 
> 	2.7 Root servers SHOULD NOT answer AXFR, or other zone transfer,
>             queries from clients other than other root servers.
> 
> The update, RFC 7720 (DNS Root Name Service Protocol and Deployment Requirements)
> don't even mention AXFR at all.
> All I found is https://tools.ietf.org/html/rfc7720#section-2
> 
> 	o MUST implement core DNS [RFC1035] and clarifications to the DNS [RFC2181].
> 
> Is AXFR a strict requirement for root-servers today?

There's no requirement for AXFR and some root letters don't serve
AXFR. E.g., L and M don't whereas F does.

		Mukund