CAPPORT Architecture
draft-larose-capport-architecture-01

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Internet Engineering Task Force                                K. Larose
Internet-Draft                                                 D. Dolson
Intended status: Informational                                  Sandvine
Expires: December 31, 2017                                 June 29, 2017

                          CAPPORT Architecture
                  draft-larose-capport-architecture-01

Abstract

   This document aims to document consensus on the CAPPORT architecture.
   DHCP or Router Advertisements, ICMP, and an HTTP API are used to
   provide the solution.  The role of Provisioning Domains (PvDs) is
   described.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on December 31, 2017.

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   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Larose & Dolson         Expires December 31, 2017               [Page 1]
Internet-Draft            CAPPORT Architecture                 June 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Components  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  User Equipment  . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  Provisioning Service  . . . . . . . . . . . . . . . . . .   5
       2.2.1.  DHCP or Router Advertisements . . . . . . . . . . . .   6
       2.2.2.  Provisioning Domains  . . . . . . . . . . . . . . . .   6
     2.3.  Captive Portal API Server . . . . . . . . . . . . . . . .   6
     2.4.  Captive Portal Enforcement  . . . . . . . . . . . . . . .   7
     2.5.  ICMP/ICMP6  . . . . . . . . . . . . . . . . . . . . . . .   8
     2.6.  Component Diagram . . . . . . . . . . . . . . . . . . . .   8
   3.  Solution Workflow . . . . . . . . . . . . . . . . . . . . . .  10
     3.1.  Initial Connection  . . . . . . . . . . . . . . . . . . .  10
     3.2.  Conditions Expire . . . . . . . . . . . . . . . . . . . .  10
   4.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  11
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  11
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  11
     6.1.  Trusting the Network  . . . . . . . . . . . . . . . . . .  11
     6.2.  Authenticated APIs  . . . . . . . . . . . . . . . . . . .  12
     6.3.  Risk of Nuisance Captive Portal . . . . . . . . . . . . .  12
     6.4.  User Options  . . . . . . . . . . . . . . . . . . . . . .  13
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  13
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   In this document, "Captive Portal" is used to describe a network to
   which a device may be voluntarily attached, such that network access
   is limited until some requirements have been fulfilled.  Typically a
   user is required to use a web browser to fulfil requirements imposed
   by the network operator, such as reading advertisements, accepting an
   acceptable-use policy, or providing some form of credentials.

   Implementations generally require a web server, some method to allow/
   block traffic, and some method to alert the user.  Common methods of
   alerting the user involve modifying HTTP or DNS traffic.

   Problems with captive portal implementations have been described in
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