Native NAT Traversal Mode for the Host Identity Protocol
draft-ietf-hip-native-nat-traversal-14

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Last updated 2016-11-24
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HIP Working Group                                             A. Keranen
Internet-Draft                                                  J. Melen
Intended status: Standards Track                            M. Komu, Ed.
Expires: May 28, 2017                                           Ericsson
                                                       November 24, 2016

        Native NAT Traversal Mode for the Host Identity Protocol
                 draft-ietf-hip-native-nat-traversal-14

Abstract

   This document specifies a new Network Address Translator (NAT)
   traversal mode for the Host Identity Protocol (HIP).  The new mode is
   based on the Interactive Connectivity Establishment (ICE) methodology
   and UDP encapsulation of data and signaling traffic.  The main
   difference from the previously specified modes is the use of HIP
   messages for all NAT traversal procedures.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 28, 2017.

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
   (http://trustee.ietf.org/license-info) 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 document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

Keranen, et al.           Expires May 28, 2017                  [Page 1]
Internet-Draft        HIP Native NAT Traversal Mode        November 2016

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Overview of Operation . . . . . . . . . . . . . . . . . . . .   6
   4.  Protocol Description  . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Relay Registration  . . . . . . . . . . . . . . . . . . .   7
     4.2.  Transport Address Candidate Gathering . . . . . . . . . .  10
     4.3.  NAT Traversal Mode Negotiation  . . . . . . . . . . . . .  11
     4.4.  Connectivity Check Pacing Negotiation . . . . . . . . . .  12
     4.5.  Base Exchange via HIP Relay Server  . . . . . . . . . . .  13
     4.6.  Connectivity Checks . . . . . . . . . . . . . . . . . . .  16
       4.6.1.  Connectivity Check Procedure  . . . . . . . . . . . .  16
       4.6.2.  Rules for Connectivity Checks . . . . . . . . . . . .  19
       4.6.3.  Rules for Concluding Connectivity Checks  . . . . . .  21
     4.7.  NAT Traversal Alternatives  . . . . . . . . . . . . . . .  22
       4.7.1.  Minimal NAT Traversal Support . . . . . . . . . . . .  22
       4.7.2.  Base Exchange without Connectivity Checks . . . . . .  22
       4.7.3.  Initiating a Base Exchange both with and without UDP
               Encapsulation . . . . . . . . . . . . . . . . . . . .  23
     4.8.  Sending Control Packets after the Base Exchange . . . . .  24
     4.9.  Mobility Handover Procedure . . . . . . . . . . . . . . .  25
     4.10. NAT Keepalives  . . . . . . . . . . . . . . . . . . . . .  27
     4.11. Closing Procedure . . . . . . . . . . . . . . . . . . . .  28
     4.12. Relaying Considerations . . . . . . . . . . . . . . . . .  28
       4.12.1.  Forwarding Rules and Permissions . . . . . . . . . .  28
       4.12.2.  HIP Data Relay and Relaying of Control Packets . . .  29
       4.12.3.  Handling Conflicting SPI Values  . . . . . . . . . .  30
   5.  Packet Formats  . . . . . . . . . . . . . . . . . . . . . . .  30
     5.1.  HIP Control Packets . . . . . . . . . . . . . . . . . . .  31
     5.2.  Connectivity Checks . . . . . . . . . . . . . . . . . . .  31
     5.3.  Keepalives  . . . . . . . . . . . . . . . . . . . . . . .  32
     5.4.  NAT Traversal Mode Parameter  . . . . . . . . . . . . . .  32
     5.5.  Connectivity Check Transaction Pacing Parameter . . . . .  33
     5.6.  Relay and Registration Parameters . . . . . . . . . . . .  33
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