An Experimental TCP Option for Host Identification
draft-williams-exp-tcp-host-id-opt-08

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Last updated 2016-09-21 (latest revision 2016-06-14)
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Network Working Group                                        B. Williams
Internet-Draft                                              Akamai, Inc.
Intended status: Informational                              M. Boucadair
Expires: December 16, 2016                                France Telecom
                                                                 D. Wing
                                                     Cisco Systems, Inc.
                                                           June 14, 2016

           An Experimental TCP Option for Host Identification
                 draft-williams-exp-tcp-host-id-opt-08

Abstract

   Recent RFCs have discussed issues with host identification in IP
   address sharing systems, such as shared address/prefix sharing
   devices and application-layer proxies.  Potential solutions for
   revealing a host identifier in shared address deployments have also
   been discussed.  This memo describes the design, deployment, and
   privacy considerations for one such solution in operational use on
   the Internet today that uses a TCP option to transmit a host
   identifier.

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
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   This Internet-Draft will expire on December 16, 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

Williams, et al.        Expires December 16, 2016               [Page 1]
Internet-Draft       Experimental TCP Host ID Option           June 2016

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Important Use Cases . . . . . . . . . . . . . . . . . . .   3
     1.2.  Document Goals  . . . . . . . . . . . . . . . . . . . . .   5
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Option Format . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Option Use  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Option Values . . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Sending Host Requirements . . . . . . . . . . . . . . . .   8
       4.2.1.  Alternative SYN Cookie Support  . . . . . . . . . . .   8
       4.2.2.  Persistent TCP Connections  . . . . . . . . . . . . .   8
       4.2.3.  Packet Fragmentation  . . . . . . . . . . . . . . . .   9
     4.3.  Multiple In-Path HOST_ID Senders  . . . . . . . . . . . .   9
   5.  Option Interpretation . . . . . . . . . . . . . . . . . . . .  10
   6.  Interaction with Other TCP Options  . . . . . . . . . . . . .  11
     6.1.  Multipath TCP (MPTCP) . . . . . . . . . . . . . . . . . .  11
     6.2.  Authentication Option (TCP-AO)  . . . . . . . . . . . . .  11
     6.3.  TCP Fast Open (TFO) . . . . . . . . . . . . . . . . . . .  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   8.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  13
   9.  Pervasive Monitoring Considerations . . . . . . . . . . . . .  14
   10. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
   11. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     12.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Appendix A.  Change History . . . . . . . . . . . . . . . . . . .  18
     A.1.  Changes from version 07 to 08 . . . . . . . . . . . . . .  18
     A.2.  Changes from version 06 to 07 . . . . . . . . . . . . . .  18
     A.3.  Changes from version 05 to 06 . . . . . . . . . . . . . .  19
     A.4.  Changes from version 04 to 05 . . . . . . . . . . . . . .  19
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