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Updates to Network Address Translation (NAT) Behavioral Requirements (RFC7857) Disclosure Number: IPCOM000246733D
Original Publication Date: 2016-Apr-01
Included in the Prior Art Database: 2016-Jun-29
Document File: 28 page(s) / 29K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

R. Penno: AUTHOR [+5]


[RFC4787], [RFC5382], and [RFC5508] contributed to enhance Network Address Translation (NAT) interoperability and conformance. Operational experience gained through widespread deployment and evolution of NAT indicates that some areas of the original documents need further clarification or updates. This document provides such clarifications and updates.

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Internet Engineering Task Force (IETF)                          R. Penno Request for Comments: 7857                                         Cisco BCP: 127                                                    S. Perreault Updates: 4787, 5382, 5508                            Jive Communications Category: Best Current Practice                        M. Boucadair, Ed. ISSN: 2070-1721                                                   Orange                                                             S. Sivakumar                                                                    Cisco                                                                 K. Naito                                                                      NTT                                                               April 2016

   Updates to Network Address Translation (NAT) Behavioral Requirements


   This document clarifies and updates several requirements of RFCs    4787, 5382, and 5508 based on operational and development experience.    The focus of this document is Network Address Translation from IPv4    to IPv4 (NAT44).

   This document updates RFCs 4787, 5382, and 5508.

Status of This Memo

   This memo documents an Internet Best Current Practice.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    BCPs is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

 Penno, et al.             Best Current Practice                 [Page 1]
 RFC 7857         Updates to NAT Behavioral Requirements       April 2016

 Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restrictions with respect    to this docume...