Using PCP to update dynamic DNS
draft-deng-pcp-ddns-05
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
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This Internet-Draft will expire on April 16, 2013.
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Deng, et al. Expires April 16, 2013 [Page 1]
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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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communications initiated from outside can be routed to the
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