IPv6 Address Usage Recommendations
draft-gont-6man-address-usage-recommendations-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
Task Force (IETF). Note that other groups may also distribute
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Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
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 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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