Anonymity Profiles for DHCP Clients
RFC 7844
Document | Type | RFC - Proposed Standard (May 2016; No errata) | |
---|---|---|---|
Authors | Christian Huitema , Tomek Mrugalski , Suresh Krishnan | ||
Last updated | 2016-05-17 | ||
Replaces | draft-huitema-dhc-anonymity-profile | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Bernie Volz | ||
Shepherd write-up | Show (last changed 2016-01-13) | ||
IESG | IESG state | RFC 7844 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Brian Haberman | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) C. Huitema Request for Comments: 7844 Microsoft Category: Standards Track T. Mrugalski ISSN: 2070-1721 ISC S. Krishnan Ericsson May 2016 Anonymity Profiles for DHCP Clients Abstract Some DHCP options carry unique identifiers. These identifiers can enable device tracking even if the device administrator takes care of randomizing other potential identifications like link-layer addresses or IPv6 addresses. The anonymity profiles are designed for clients that wish to remain anonymous to the visited network. The profiles provide guidelines on the composition of DHCP or DHCPv6 messages, designed to minimize disclosure of identifying information. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7844. Huitema, et al. Standards Track [Page 1] RFC 7844 DHCP Anonymity Profiles May 2016 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 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Huitema, et al. Standards Track [Page 2] RFC 7844 DHCP Anonymity Profiles May 2016 Table of Contents 1. Introduction ....................................................4 1.1. Requirements ...............................................4 2. Application Domain ..............................................4 2.1. MAC Address Randomization Hypotheses .......................5 2.2. MAC Address Randomization and DHCP .........................6 2.3. Radio Fingerprinting .......................................6 2.4. Operating System Fingerprinting ............................7 2.5. No Anonymity Profile Identification ........................7 2.6. Using the Anonymity Profiles ...............................8 2.7. What about privacy for DHCP servers? .......................9 3. Anonymity Profile for DHCPv4 ....................................9 3.1. Avoiding Fingerprinting ...................................10 3.2. Client IP Address Field ...................................10 3.3. Requested IP Address Option ...............................11 3.4. Client Hardware Address Field .............................12 3.5. Client Identifier Option ..................................12 3.6. Parameter Request List Option .............................13 3.7. Host Name Option ..........................................13 3.8. Client FQDN Option ........................................14 3.9. UUID/GUID-Based Client Machine Identifier Option ..........15 3.10. User and Vendor Class DHCP Options .......................15 4. Anonymity Profile for DHCPv6 ...................................15 4.1. Avoiding Fingerprinting ...................................16 4.2. Do not send Confirm messages, unless really sure about the location ..............................................17 4.3. Client Identifier DHCPv6 Option ...........................17 4.3.1. Anonymous Information-request ......................18 4.4. Server Identifier Option ..................................18 4.5. Address Assignment Options ................................18 4.5.1. Obtain Temporary Addresses .........................19 4.5.2. Prefix Delegation ..................................20 4.6. Option Request Option .....................................20Show full document text