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Location Information Server (LIS) Discovery using IP address and Reverse DNS
draft-ietf-geopriv-res-gw-lis-discovery-08

Document type: Active Internet-Draft (geopriv WG)
Document stream: IETF
Last updated: 2014-01-28 (latest revision 2013-12-18)
Intended RFC status: Proposed Standard
Other versions: plain text, xml, pdf, html

IETF State: WG Document
Consensus: Yes
Document shepherd: Alissa Cooper
Shepherd Write-Up: Last changed 2013-07-17

IESG State: RFC Ed Queue
IANA Action State: No IC
RFC Editor State: AUTH48
Responsible AD: Richard Barnes
IESG Note: Alissa Cooper (acooper@cdt.org) is the document shepherd.
Send notices to: geopriv-chairs@tools.ietf.org, draft-ietf-geopriv-res-gw-lis-discovery@tools.ietf.org

GEOPRIV                                                       M. Thomson
Internet-Draft                                                   Mozilla
Intended status: Standards Track                               R. Bellis
Expires: June 22, 2014                                        Nominet UK
                                                       December 19, 2013

Location Information Server (LIS) Discovery using IP address and Reverse
                                  DNS
               draft-ietf-geopriv-res-gw-lis-discovery-08

Abstract

   The residential gateway is a device that has become an integral part
   of home networking equipment.  Discovering a Location Information
   Server (LIS) is a necessary part of acquiring location information
   for location-based services.  However, discovering a LIS when a
   residential gateway is present poses a configuration challenge,
   requiring a method that is able to work around the obstacle presented
   by the gateway.

   This document describes a solution to this problem.  The solution
   provides alternative domain names as input to the LIS discovery
   process based on the network addresses assigned to a Device.

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 June 22, 2014.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Thomson & Bellis          Expires June 22, 2014                 [Page 1]
Internet-Draft             LIS Discovery by IP             December 2013

   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Conventions used in this document . . . . . . . . . . . . . .   3
   3.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Residential Gateway . . . . . . . . . . . . . . . . . . .   5
     3.2.  Residential Gateway Security Features . . . . . . . . . .   6
   4.  IP-based DNS Solution . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Identification of IP Addresses  . . . . . . . . . . . . .   7
     4.2.  Domain Name Selection . . . . . . . . . . . . . . . . . .   8
     4.3.  Shortened DNS Names . . . . . . . . . . . . . . . . . . .   8
     4.4.  When To Use The Reverse DNS Method  . . . . . . . . . . .   9
     4.5.  Private Address Spaces  . . . . . . . . . . . . . . . . .   9
     4.6.  Necessary Assumptions and Restrictions  . . . . . . . . .  10
     4.7.  Failure Modes . . . . . . . . . . . . . . . . . . . . . .  10
     4.8.  Deployment Considerations . . . . . . . . . . . . . . . .  11
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   6.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  12
   8.  IAB Considerations  . . . . . . . . . . . . . . . . . . . . .  13
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  15
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     10.2.  Informative References . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  17

1.  Introduction

   A Location Information Server (LIS) is a service provided by an
   access network.  The LIS uses knowledge of the access network
   topology and other information to generate location information for
   Devices.  Devices within an access network are able to acquire
   location information from a LIS.

   The relationship between a Device and an access network might be

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