Privacy Considerations for DHCP
RFC 7819
Document | Type | RFC - Informational (April 2016; No errata) | |
---|---|---|---|
Authors | Suresh Krishnan , Tomek Mrugalski , Sheng Jiang | ||
Last updated | 2016-04-30 | ||
Replaces | draft-jiang-dhc-dhcp-privacy | ||
Stream | Internet 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 2016-01-12) | ||
IESG | IESG state | RFC 7819 (Informational) | |
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) S. Jiang Request for Comments: 7819 Huawei Technologies Co., Ltd Category: Informational S. Krishnan ISSN: 2070-1721 Ericsson T. Mrugalski ISC April 2016 Privacy Considerations for DHCP Abstract DHCP is a protocol that is used to provide addressing and configuration information to IPv4 hosts. This document discusses the various identifiers used by DHCP and the potential privacy issues. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. 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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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/rfc7819. 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. Jiang, et al. Informational [Page 1] RFC 7819 DHCP Privacy Considerations April 2016 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Requirements Language and Terminology . . . . . . . . . . . . 3 3. DHCP Options Carrying Identifiers . . . . . . . . . . . . . . 4 3.1. Client Identifier Option . . . . . . . . . . . . . . . . 4 3.2. Address Fields and Options . . . . . . . . . . . . . . . 4 3.3. Client FQDN Option . . . . . . . . . . . . . . . . . . . 5 3.4. Parameter Request List Option . . . . . . . . . . . . . . 5 3.5. Vendor Class and Vendor-Identifying Vendor Class Options 5 3.6. Civic Location Option . . . . . . . . . . . . . . . . . . 6 3.7. Coordinate-Based Location Option . . . . . . . . . . . . 6 3.8. Client System Architecture Type Option . . . . . . . . . 6 3.9. Relay Agent Information Option and Suboptions . . . . . . 6 4. Existing Mechanisms That Affect Privacy . . . . . . . . . . . 7 4.1. DNS Updates . . . . . . . . . . . . . . . . . . . . . . . 7 4.2. Allocation Strategies . . . . . . . . . . . . . . . . . . 7 5. Attacks . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.1. Device Type Discovery . . . . . . . . . . . . . . . . . . 9 5.2. Operating System Discovery . . . . . . . . . . . . . . . 9 5.3. Finding Location Information . . . . . . . . . . . . . . 9 5.4. Finding Previously Visited Networks . . . . . . . . . . . 9 5.5. Finding a Stable Identity . . . . . . . . . . . . . . . . 9 5.6. Pervasive Monitoring . . . . . . . . . . . . . . . . . . 10 5.7. Finding Client's IP Address or Hostname . . . . . . . . . 10 5.8. Correlation of Activities over Time . . . . . . . . . . . 10 5.9. Location Tracking . . . . . . . . . . . . . . . . . . . . 10 5.10. Leasequery and Bulk Leasequery . . . . . . . . . . . . . 11 6. Security Considerations . . . . . . . . . . . . . . . . . . . 11 7. Privacy Considerations . . . . . . . . . . . . . . . . . . . 11 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 12 8.1. Normative References . . . . . . . . . . . . . . . . . . 12 8.2. Informative References . . . . . . . . . . . . . . . . . 12 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 14 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14 Jiang, et al. Informational [Page 2] RFC 7819 DHCP Privacy Considerations April 2016 1. Introduction The Dynamic Host Configuration Protocol (DHCP) [RFC2131] is used toShow full document text