Dynamic Authorization Proxying in Remote Authorization Dial-In User Service Protocol (RADIUS)
draft-ietf-radext-coa-proxy-04

Document Type Active Internet-Draft (radext WG)
Last updated 2018-06-21 (latest revision 2018-04-24)
Replaces draft-dekok-radext-coa-proxy
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Stefan Winter
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Responsible AD Benjamin Kaduk
Send notices to Stefan Winter <stefan.winter@restena.lu>
Network Working Group                                        DeKok, Alan
INTERNET-DRAFT                                                FreeRADIUS
Updates: 5176                                                J. Korhonen
Category: Standards Track                         Nokia Siemens Networks
<draft-ietf-radext-coa-proxy-04.txt>
24 April 2018

                   Dynamic Authorization Proxying in
      Remote Authorization Dial-In User Service Protocol (RADIUS)
                   draft-ietf-radext-coa-proxy-04.txt

Abstract

   RFC 5176 defines Change of Authorization (CoA) and Disconnect Message
   (DM) behavior for RADIUS.  Section 3.1 of that document suggests that
   proxying these messages is possible, but gives no guidance as to how
   that is done.  This specification corrects that omission for
   scenarios where networks use Realm-based proxying as defined in
   [RFC7542].

Status of this Memo

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

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   This Internet-Draft will expire on October 24, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

DeKok, Alan                   Informational                     [Page 1]
INTERNET-DRAFT  Dynamic Authorization Proxying in RADIUS   24 April 2018

   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
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   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.

DeKok, Alan                   Informational                     [Page 2]
INTERNET-DRAFT  Dynamic Authorization Proxying in RADIUS   24 April 2018

Table of Contents

1.  Introduction .............................................    4
   1.1.  Terminology .........................................    4
   1.2.  Requirements Language ...............................    5
2.  Problem Statement ........................................    6
   2.1.  Typical RADIUS Proxying .............................    6
   2.2.  CoA Processing ......................................    6
   2.3.  Failure of CoA Proxying .............................    7
3.  How to Perform CoA Proxying ..............................    7
   3.1.  Changes to Access-Request and Accounting-Request pack    8
   3.2.  Proxying of CoA-Request and Disconnect-Request packet    8
   3.3.  Operator-NAS-Identifier .............................    9
4.  Requirements .............................................   11
   4.1.  Requirements on Home Servers ........................   11
   4.2.  Requirements on Visited Networks ....................   11
   4.3.  Requirements on Proxies .............................   12
      4.3.1.  Security Requirements on Proxies ...............   12
      4.3.2.  Filtering Requirements on Proxies ..............   13
5.  Functionality ............................................   14
   5.1.  User Login ..........................................   14
   5.2.  CoA Proxing .........................................   14
6.  Security Considerations ..................................   15
7.  IANA Considerations ......................................   15
8.  References ...............................................   15
   8.1.  Normative References ................................   15
   8.2.  Informative References ..............................   16

DeKok, Alan                   Informational                     [Page 3]
INTERNET-DRAFT  Dynamic Authorization Proxying in RADIUS   24 April 2018

1.  Introduction

   RFC 5176 [RFC5176] defines Change of Authorization (CoA) and
   Disconnect Message (DM) behavior for RADIUS.  Section 3.1 of that
   document suggests that proxying these messages is possible, but gives
   no guidance as to how that is done.  This omission means that in
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