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 <e...@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 -- e...@isc.org > Internet Systems Consortium, Inc. > > _______________________________________________ > DNSOP mailing list > DNSOP@ietf.org > https://www.ietf.org/mailman/listinfo/dnsop -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop