[Last-Call] Secdir last call review of draft-ietf-ntp-port-randomization-06

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Reviewer: Sean Turner
Review result: Ready

Hi! I am doing this review as part of the Security Directorate.

This I-D updates NTP v4 [RFC 5095] to recommend the use of transport-protocol
ephemeral port randomization for those modes where use of the NTP well-known
port is not required. The port randomization recommendation is based on BCP 156
[RFC6056], which recommends the randomization of transport-protocol ephemeral
ports. This I-D is in fact co-authored by one of the co-authors of BCP 156. The
I-D motivates the recommendation and enumerates some considerations as they
relate to NTP as well as identifies the exact changes (i.e., two-sentence
dstport replaced with more text). It also appears that this I-D is well
implemented as noted in the implementation status section.


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