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Using PCP to update dynamic DNS
draft-deng-pcp-ddns-05

Document type: Active Internet-Draft (individual)
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Last updated: 2014-03-18
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DNSOP Working Group                                               X.Deng
Internet Draft                                               M.Boucadair
Intended status: Informational                            France Telecom
Expires: September 20, 2014                                       Q.Zhao
                                                                    BUPT
                                                                 J.Huang
                                                                  C.Zhou
                                                                  Huawei
                                                          March 19, 2014

                     Using PCP to update dynamic DNS
                       draft-deng-pcp-ddns-05.txt

Abstract

  This document focuses on the problems encountered when using dynamic
  DNS in address sharing contexts (e.g., DS-Lite, NAT64) during IPv6
  transition. Issues and possible solutions are documented in this memo.

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
  Task Force (IETF).  Note that other groups may also distribute
  working documents as Internet-Drafts.  The list of current Internet-
  Drafts is at http://datatracker.ietf.org/drafts/current/.

  Internet-Drafts are draft documents valid for a maximum of six months
  and may be updated, replaced, or obsoleted by other documents at any
  time.  It is inappropriate to use Internet-Drafts as reference
  material or to cite them other than as "work in progress."

  This Internet-Draft will expire on April 16, 2013.

Copyright Notice

  Copyright (c) 2012 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

Deng, et al.           Expires April 16, 2013                 [Page 1]
Internet-Draft            PCP DDNS updates               February 2014

  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. Problem Statement ........................................... 2
  2. Solution Space .............................................. 4
     2.1. Locate a Service Port .................................. 4
     2.2. Detect Changes ......................................... 4
  3. Possible Solutions .......................................... 6
     3.1. Topology ............................................... 6
     3.2. For Web Service ........................................ 7
     3.3. For Non-web Service .................................... 8
  4. Security Considerations ..................................... 9
  5. IANA Considerations ........................................ 10
  6. Additional Authors' Addresses .............................. 10
  7. Acknowledgments ............................................ 10
  8. References ................................................. 10
     8.1. Normative References................................... 10
     8.2. Informative References ................................ 11
  9. Authors' Addresses ......................................... 12

1. Problem Statement

  Dynamic DNS (DDNS) is a widely deployed service to facilitate hosting
  servers (e.g., to host webcam and http server) at premises. There are
  a number of providers who offer a DDNS service, working in a client
  and server mode, which mostly use a web-form based communication.
  DDNS clients are generally implemented in the user's router or
  computer, which once detects changes to its IP address it
  automatically sends an update message to the DDNS server. The
  communication between the client and the server is not standardized,
  varying from one provider to another, although a few standard web-
  based methods of updating emerged over time.

  When the network architecture evolves towards an IPv4 sharing
  architecture during IPv6 transition, the DDNS Client will have to not
  only inform the IP address updates if any, but also to notify the
  changes of external port on which the service is listening, because
  well known port numbers, e.g. port 80 will no longer be available to
  every web server. It will also require the ability to configure
  corresponding port forwarding on CGN devices, so that incoming

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