For those lacking context on "aggressive negative caching", see 
https://datatracker.ietf.org/doc/rfc8198/

--Ben Schwartz
________________________________
From: Roy Arends <r...@dnss.ec>
Sent: Monday, July 22, 2024 3:45 PM
To: dnsop <dnsop@ietf.org>
Subject: [DNSOP] Response to draft-fbw-dnsop-dnszonehop

I saw this on the agenda for this afternoon.

The proposed solution against zone-walking is to exclude names from an nsec 
chain.

Example, say "B" needs to kept private from zone-walking, so have:

A.example. NSEC C.example.
B.example. A 192.168.10.10
C.example. NSEC ...

This is a terrible idea. This will break DNSSEC. Agressive negative caching 
will make sure that B won't exist, since the A NSEC C record proves it.

Happy to discuss it in the WG this afternoon.

Roy
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