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Re: [DNSOP] I-D Action: draft-ietf-dnsop-dnssec-bootstrapping-01.txt

John Levine <johnl@taugh.com> Sun, 19 June 2022 17:30 UTC

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From: John Levine <johnl@taugh.com>
To: dnsop@ietf.org
Cc: libor.peltan@nic.cz
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/Ld0lgCwJJQvgKIA9eBv8yEtgeoI>
Subject: Re: [DNSOP] I-D Action: draft-ietf-dnsop-dnssec-bootstrapping-01.txt
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It appears that libor.peltan  <libor.peltan@nic.cz> said:
>Alternatively, we may say that the RFC8078 bootstrapping is deprecated, 
>but still, it doesn't mean that we replace it.

That seems reasonable.  Does anyone actually do the current TOFU-ish bootstrap?

>>> Do no longer suggest NSEC-walking Signaling Domains. (It does not 
>>> work well due to the Signaling Type prefix. What's more, it's unclear 
>>> who would do this: Parents know there delegations and can do a 
>>> targeted scan; others are not interested.)

There's still a reference to NSEC walking in the penultimate paragraph in sec 3.3.

I think it's still worth a suggestion in the trigger section that
operators allow AXFR of the signal information. While probing is just
as fast if there are only a few domains delegated to a NS, there are
name servers that have hundreds of thousands or millions of delegated
names.

I counted name servers in the .com zone, and found 93 with more than a
million each, a total of 120 million delegations. Even very slow AXFRs
of 93 zones are a lot faster than 120 million DNS queries.

Here's the first 20 of them:

4058923 nsg2.namebrightdns.com.
4058900 nsg1.namebrightdns.com.
3792278 dns1.registrar-servers.com.
3790659 dns2.registrar-servers.com.
3448893 ns1.gname-dns.com.
3448848 ns2.gname-dns.com.
2911454 jm1.dns.com.
2911442 jm2.dns.com.
2007121 ns1.bluehost.com.
2006794 ns2.bluehost.com.
1307459 ns1.dnsowl.com.
1307396 ns2.dnsowl.com.
1298775 ns3.dnsowl.com.
1174095 ns02.squarespacedns.com.
1174093 ns01.squarespacedns.com.
1135648 ns03.squarespacedns.com.
1135645 ns04.squarespacedns.com.
1119945 dm2.dns.com.
1119944 dm1.dns.com.
1118011 ns-cloud-c1.googledomains.com.

R's,
John

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