IPv6 Address Usage Recommendations
draft-gont-6man-address-usage-recommendations-03

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Last updated 2017-07-03
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IPv6 maintenance Working Group (6man)                            F. Gont
Internet-Draft                                    SI6 Networks / UTN-FRH
Intended status: Best Current Practice                           G. Gont
Expires: January 4, 2018                                    SI6 Networks
                                                         M. Garcia Corbo
                                                                 SITRANS
                                                              C. Huitema
                                                    Private Octopus Inc.
                                                            July 3, 2017

                   IPv6 Address Usage Recommendations
            draft-gont-6man-address-usage-recommendations-03

Abstract

   This document analyzes the security and privacy implications of IPv6
   addresses based on a number of properties such as address scope,
   stability, and usage type.  It analyzes what properties are desirable
   for some popular scenarios, and provides advice regarding the
   configuration and usage of such addresses.

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
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   This Internet-Draft will expire on January 4, 2018.

Copyright Notice

   Copyright (c) 2017 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

Gont, et al.             Expires January 4, 2018                [Page 1]
Internet-Draft        IPv6 Address Recommendations             July 2017

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

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Background  . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
     4.1.  Issues Associated with Sub-optimal IPv6 Address Usage . .   4
       4.1.1.  Testing for the Presence of Node in the Network . . .   4
       4.1.2.  Unexpected Address Discovery  . . . . . . . . . . . .   4
       4.1.3.  Availability Outside the Expected Scope . . . . . . .   5
     4.2.  Current Limitations in the Address Selection API  . . . .   5
   5.  IPv6 Address Considerations . . . . . . . . . . . . . . . . .   6
     5.1.  Address Scope Considerations  . . . . . . . . . . . . . .   6
     5.2.  Address Stability Considerations  . . . . . . . . . . . .   6
     5.3.  Usage Type Considerations . . . . . . . . . . . . . . . .   8
   6.  Possible Approaches for IPv6 Address Usage  . . . . . . . . .   9
   7.  Advice on IPv6 Address Configuration  . . . . . . . . . . . .  10
   8.  Advice on IPv6 Address Usage  . . . . . . . . . . . . . . . .  10
   9.  Future Work . . . . . . . . . . . . . . . . . . . . . . . . .  11
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   11. Security Considerations . . . . . . . . . . . . . . . . . . .  11
   12. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   13. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     13.1.  Normative References . . . . . . . . . . . . . . . . . .  12
     13.2.  Informative References . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   IPv6 hosts typically configure a number of IPv6 addresses, which may
   differ in multiple aspects, such as address scope and stability (e.g.
   stable addresses vs.  temporary addresses).  For example, a host may
   configure one stable and one temporary address per each
   autoconfiguration prefix advertised on the local network.  The
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