[ipv6hackers] Fwd: RFC 8981 on Temporary Address Extensions for Stateless Address Autoconfiguration in IPv6

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Fernando Gont

Feb 28, 2021, 9:38:34 PM2/28/21
to IPv6 Hackers Mailing List

RFC 8981, entitled "Temporary Address Extensions for Stateless Address
Autoconfiguration in IPv6", has finally been published:

It has been the product of over four years of work.

It is revision of RFC4941 -- the so called "IPv6 temporary addresses",
also known as "IPv6 Privacy Addresses".

This revision does a number of interesting things, including:

* It employs a different algorithms for generating the Interface
Identifiers (IIDs)

* Addresses issues present in RFC4941, such as re-using the same
interface identifier across different prefixes

* The lifetimes of temporary addresses are reduced, thus reducing the
average number of addresses that may be in use at any given time.

* The lifetime of addresses is randomized, such that it's harder to
infer when addresses are re-generated.


-------- Forwarded Message --------
Subject: RFC 8981 on Temporary Address Extensions for Stateless Address
Autoconfiguration in IPv6
Date: Sun, 28 Feb 2021 13:29:06 -0800 (PST)
From: rfc-e...@rfc-editor.org
To: ietf-a...@ietf.org, rfc-...@rfc-editor.org
CC: drafts-u...@iana.org, ip...@ietf.org, rfc-e...@rfc-editor.org

A new Request for Comments is now available in online RFC libraries.

RFC 8981

Title: Temporary Address Extensions for Stateless
Address Autoconfiguration in IPv6 Author: F. Gont,
S. Krishnan,
T. Narten,
R. Draves
Status: Standards Track
Stream: IETF
Date: February 2021
Mailbox: fg...@si6networks.com,
Pages: 20
Obsoletes: RFC 4941

I-D Tag: draft-ietf-6man-rfc4941bis-12.txt

URL: https://www.rfc-editor.org/info/rfc8981

DOI: 10.17487/RFC8981

This document describes an extension to IPv6 Stateless Address
Autoconfiguration that causes hosts to generate temporary addresses
with randomized interface identifiers for each prefix advertised with
autoconfiguration enabled. Changing addresses over time limits the
window of time during which eavesdroppers and other information
collectors may trivially perform address-based network-activity
correlation when the same address is employed for multiple
transactions by the same host. Additionally, it reduces the window of
exposure of a host as being accessible via an address that becomes
revealed as a result of active communication. This document obsoletes
RFC 4941.

This document is a product of the IPv6 Maintenance Working Group of the

This is now a Proposed Standard.

STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for
the standardization state and status of this protocol. Distribution of
this memo is unlimited.

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