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NAI-based Dynamic Peer Discovery for RADIUS/TLS and RADIUS/DTLS
draft-ietf-radext-dynamic-discovery-13

Document type: Active Internet-Draft (radext WG)
Document stream: IETF
Last updated: 2015-03-20 (latest revision 2015-03-06)
Intended RFC status: Experimental
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication
Other - see Comment Log
Consensus: Yes
Document shepherd: Jouni Korhonen
Shepherd Write-Up: Last changed 2015-03-06

IESG State: Waiting for AD Go-Ahead
IANA Review State: IANA - Not OK
IANA Action State: None
(Has enough positions to pass.)
Responsible AD: Kathleen Moriarty
Send notices to: radext@ietf.org, radext-chairs@ietf.org, jounikor@gmail.com

RADIUS Extensions Working Group                                S. Winter
Internet-Draft                                                   RESTENA
Intended status: Experimental                                M. McCauley
Expires: September 7, 2015                                     AirSpayce
                                                          March 06, 2015

    NAI-based Dynamic Peer Discovery for RADIUS/TLS and RADIUS/DTLS
                 draft-ietf-radext-dynamic-discovery-13

Abstract

   This document specifies a means to find authoritative RADIUS servers
   for a given realm.  It is used in conjunction with either RADIUS/TLS
   and RADIUS/DTLS.

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
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   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 September 7, 2015.

Copyright Notice

   Copyright (c) 2015 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
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   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Winter & McCauley       Expires September 7, 2015               [Page 1]
Internet-Draft            RADIUS Peer Discovery               March 2015

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
     1.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   6
     1.3.  Document Status . . . . . . . . . . . . . . . . . . . . .   6
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  DNS Resource Record (RR) definition . . . . . . . . . . .   7
       2.1.1.  S-NAPTR . . . . . . . . . . . . . . . . . . . . . . .   7
       2.1.2.  SRV . . . . . . . . . . . . . . . . . . . . . . . . .  11
       2.1.3.  Optional name mangling  . . . . . . . . . . . . . . .  12
     2.2.  Definition of the X.509 certificate property
           SubjectAltName:otherName:NAIRealm . . . . . . . . . . . .  13
   3.  DNS-based NAPTR/SRV Peer Discovery  . . . . . . . . . . . . .  15
     3.1.  Applicability . . . . . . . . . . . . . . . . . . . . . .  15
     3.2.  Configuration Variables . . . . . . . . . . . . . . . . .  16
     3.3.  Terms . . . . . . . . . . . . . . . . . . . . . . . . . .  16
     3.4.  Realm to RADIUS server resolution algorithm . . . . . . .  17
       3.4.1.  Input . . . . . . . . . . . . . . . . . . . . . . . .  17
       3.4.2.  Output  . . . . . . . . . . . . . . . . . . . . . . .  18
       3.4.3.  Algorithm . . . . . . . . . . . . . . . . . . . . . .  18
       3.4.4.  Validity of results . . . . . . . . . . . . . . . . .  19
       3.4.5.  Delay considerations  . . . . . . . . . . . . . . . .  20
       3.4.6.  Example . . . . . . . . . . . . . . . . . . . . . . .  21
   4.  Operations and Manageability Considerations . . . . . . . . .  23
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  24
   6.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .  25
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  26
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  28
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .  28
     8.2.  Informative References  . . . . . . . . . . . . . . . . .  29
   Appendix A.  Appendix A: ASN.1 Syntax of NAIRealm . . . . . . . .  30

1.  Introduction

   RADIUS in all its current transport variants (RADIUS/UDP, RADIUS/TCP,
   RADIUS/TLS, RADIUS/DTLS) requires manual configuration of all peers
   (clients, servers).

   Where more than one administrative entity collaborates for RADIUS
   authentication of their respective customers (a "roaming
   consortium"), the Network Access Identifier (NAI)
   [I-D.ietf-radext-nai] is the suggested way of differentiating users

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