Re: [DNSOP] New Version Notification for draft-wessels-dns-zone-digest-01.txt

Mark Andrews <marka@isc.org> Mon, 30 July 2018 21:53 UTC

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From: Mark Andrews <marka@isc.org>
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Date: Tue, 31 Jul 2018 07:53:09 +1000
Cc: Ondrej Sury <ondrej@isc.org>, dnsop@ietf.org, John R Levine <johnl@taugh.com>
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To: Evan Hunt <each@isc.org>
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Subject: Re: [DNSOP] New Version Notification for draft-wessels-dns-zone-digest-01.txt
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You can do what BGP implementations have been doing for decades and
just put a count in that allows for some growth.  Named and I presume
other servers already has the ability to track records during a zone
transfer (AXFR and IXFR) and abort if the count becomes too large. 

The following allows for a ~4x growth.

zone “.” {
	type slave;
	max-records 100000;
	…
};

;; XFR size: 22541 records (messages 22541, bytes 2758345)

That said, I agree with Evan, a in zone count is a “nice to have” feature.

Mark

> On 31 Jul 2018, at 3:29 am, Evan Hunt <each@isc.org> wrote:
> 
> On Mon, Jul 30, 2018 at 09:19:14AM +0200, Ondřej Surý wrote:
>> I know some people have 40Gbps at mothers house, but for general
>> usefulness you want to prevent downloading fake (or otherwise invalid)
>> zone before you start downloading it.
> 
> While this does seem like a potentially useful feature, I don't think it's
> essential to the problem of verifiable root mirroring. "Nice to have",
> but not a requirement.
> 
> -- 
> Evan Hunt -- each@isc.org
> Internet Systems Consortium, Inc.
> 
> _______________________________________________
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> DNSOP@ietf.org
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-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka@isc.org