The IESG has approved the following document: - 'Network Address Translation (NAT) Behavioral Requirements Updates' (draft-ietf-tsvwg-behave-requirements-update-08.txt) as Best Current Practice This document is the product of the Transport Area Working Group. The IESG contact persons are Spencer Dawkins and Martin Stiemerling. A URL of this Internet Draft is: https://datatracker.ietf.org/doc/draft-ietf-tsvwg-behave-requirements-update/ Technical Summary This is a maintenance draft for NAT behavioral requirements that were originally specified in the (now closed) behave WG. As the last remaining work item in the behave WG, this draft was transferred to the tsvwg WG for completion. See the draft for discussion of its relationship to RFCs 4787, 5382, 5508 - all three of those RFCs will be updated by RFC publication of this draft. Best Current Practice status has been requested because this draft updates behavioral (and in some cases, operational) guidelines for NAT functionality, which is widely deployed in the Internet, and because it is based on experience with implementation and deployment of the three RFCs that it modifies. Working Group Summary This draft is supported by the portion of the TSVWG that is interested in NAT behavior, and has received reviews and discussions from several experts within that community (some of these reviews have been solicited by the WG chairs). Outside of the reviews, there has been limited WG discussion, as the draft was basically complete when it was transferred to the tsvwg WG. On IPR: During the first WGLC for this draft, one of the authors indicated that there was previously disclosed IPR that the WG chairs were not aware of. The underlying cause turned out to be some missing "updated by" links in the datatracker - adding those links caused an existing IPR disclosure to be applied to this draft. A second WGLC was run to call attention to the newly applicable IPR disclosure. No objections based on the IPR disclosure were received (but we did get another good expert review of the draft). With the missing "updated by" links now in place, each draft author has stated their direct, personal knowledge that any IPR related to this document has already been disclosed, in conformance with BCPs 78 and 79 Document Quality This is a requirements document, so no implementation is applicable. Personnel Document Shepherd: David Black Responsible AD: Spencer Dawkins