Privacy Extensions for Stateless Address Autoconfiguration in IPv6
RFC 4941, “Privacy Extensions for Stateless Address Autoconfiguration in IPv6”, is a Draft Standard document published in September 2007 by T. Narten, R. Draves, S. Krishnan. It obsoletes RFC 3041. It has been obsoleted by RFC 8981 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
Nodes use IPv6 stateless address autoconfiguration to generate addresses using a combination of locally available information and information advertised by routers. Addresses are formed by combining network prefixes with an interface identifier. On an interface that contains an embedded IEEE Identifier, the interface identifier is typically derived from it. On other interface types, the interface identifier is generated through other means, for example, via random number generation. This document describes an extension to IPv6 stateless address autoconfiguration for interfaces whose interface identifier is derived from an IEEE identifier. Use of the extension causes nodes to generate global scope addresses from interface identifiers that change over time, even in cases where the interface contains an embedded IEEE identifier. Changing the interface identifier (and the global scope addresses generated from it) over time makes it more difficult for eavesdroppers and other information collectors to identify when different addresses used in different transactions actually correspond to the same node. [STANDARDS-TRACK]
What “Draft Standard” means
A historical maturity level (retired in 2011) that sat between Proposed Standard and Internet Standard and required multiple interoperable implementations.
The canonical text of RFC 4941 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 4940 IANA Considerations for OSPF
- RFC 4942 IPv6 Transition/Co-existence Security Considerations
- RFC 4939 Definitions of Managed Objects for iSNS
- RFC 4943 IPv6 Neighbor Discovery On-Link Assumption Considered Harmful
- RFC 4938 PPP Over Ethernet Extensions for Credit Flow and Link Metrics
- RFC 4944 Transmission of IPv6 Packets over IEEE 802.15.4 Networks
- RFC 4937 IANA Considerations for PPP over Ethernet
- RFC 4945 The Internet IP Security PKI Profile of IKEv1/ISAKMP, IKEv2, and PKIX