Last Call Review of draft-ietf-dnsop-nxdomain-cut-03
review-ietf-dnsop-nxdomain-cut-03-secdir-lc-montville-2016-07-28-00

I have reviewed this document as part of the security directorate's ongoing
effort to review all IETF documents being processed by the IESG. These comments
were written primarily for the benefit of the security area directors. Document
editors and WG chairs should treat these comments just like any other last call
comments.

This document is: Ready

This document explains the reasoning behind, and advantages of, NXDOMAIN cut—a
method of ensuring that non-existence of a node in the domain name tree implies
non-existence of the entire sub-tree.  The solution does seem to require
DNSSEC, as mentioned in the security considerations section, to avoid certain
DOS circumstances (which are already possible, but potentially amplified by
NXDOMAIN cut).

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