Network Address Translation (NAT) Behavioral Requirements Updates
draft-ietf-tsvwg-behave-requirements-update-02

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Replaces draft-ietf-behave-requirements-update
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TSVWG                                                           R. Penno
Internet-Draft                                                     Cisco
Intended status: Best Current Practice                      S. Perreault
Expires: February 13, 2016                           Jive Communications
                                                              S. Kamiset
                                                        Insieme Networks
                                                            M. Boucadair
                                                          France Telecom
                                                                K. Naito
                                                                     NTT
                                                         August 12, 2015

   Network Address Translation (NAT) Behavioral Requirements Updates
             draft-ietf-tsvwg-behave-requirements-update-02

Abstract

   This document clarifies and updates several requirements of RFC4787,
   RFC5382 and RFC5508 based on operational and development experience.
   The focus of this document is NAT44.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on February 13, 2016.

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   document authors.  All rights reserved.

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Penno, et al.           Expires February 13, 2016               [Page 1]
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   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Scope . . . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  TCP Session Tracking  . . . . . . . . . . . . . . . . . . . .   3
     2.1.  TCP Transitory Connection Idle-Timeout  . . . . . . . . .   4
     2.2.  TCP RST . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Port Overlapping Behavior . . . . . . . . . . . . . . . . . .   5
   4.  Address Pooling Paired (APP)  . . . . . . . . . . . . . . . .   6
   5.  EIF Protocol Independence . . . . . . . . . . . . . . . . . .   6
   6.  EIF Mapping Refresh . . . . . . . . . . . . . . . . . . . . .   7
     6.1.  Outbound Mapping Refresh and Error Packets  . . . . . . .   7
   7.  EIM Protocol Independence . . . . . . . . . . . . . . . . . .   7
   8.  Port Parity . . . . . . . . . . . . . . . . . . . . . . . . .   7
   9.  Port Randomization  . . . . . . . . . . . . . . . . . . . . .   8
   10. IP Identification (IP ID) . . . . . . . . . . . . . . . . . .   8
   11. ICMP Query Mappings Timeout . . . . . . . . . . . . . . . . .   8
   12. Hairpinning Support for ICMP Packets  . . . . . . . . . . . .   9
   13. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   14. Security Considerations . . . . . . . . . . . . . . . . . . .   9
   15. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   16. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     16.1.  Normative References . . . . . . . . . . . . . . . . . .  10
     16.2.  Informative References . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   [RFC4787], [RFC5382] and [RFC5508] greatly advanced NAT
   interoperability and conformance.  But with widespread deployment and
   evolution of Network Address Translation (NAT) more development and
   operational experience was acquired some areas of the original
   documents need further clarification or updates.  This document
   provides such clarifications and updates.

1.1.  Scope

   The goal of this document is to clarify and update the set of
   requirements listed in [RFC4787], [RFC5382] and [RFC5508].  The
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