The Network Access Identifier
draft-ietf-radext-nai-10

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Last updated 2014-11-26 (latest revision 2014-10-30)
Replaces draft-dekok-radext-nai
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RADEXT Working Group                                         DeKok, Alan
INTERNET-DRAFT                                                FreeRADIUS
Obsoletes: 4282
Category: Standards Track
<draft-ietf-radext-nai-10.txt>
29 October 2014

                     The Network Access Identifier
                        draft-ietf-radext-nai-10

Abstract

   In order to provide inter-domain authentication services, it is
   necessary to have a standardized method that domains can use to
   identify each other's users.  This document defines the syntax for
   the Network Access Identifier (NAI), the user identity submitted by
   the client prior to accessing resources. This document is a revised
   version of RFC 4282, which addresses issues with international
   character sets, as well as a number of other corrections to the
   previous document.

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with the
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Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the

DeKok, Alan                  Standards Track                    [Page 1]
INTERNET-DRAFT        The Network Access Identifier      29 October 2014

   document authors. All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   This document may contain material from IETF Documents or IETF
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DeKok, Alan                  Standards Track                    [Page 2]
INTERNET-DRAFT        The Network Access Identifier      29 October 2014

Table of Contents

Appendix A - Changes from RFC4282 ............................    3
1.  Introduction .............................................    4
   1.1.  Terminology .........................................    5
   1.2.  Requirements Language ...............................    6
   1.3.  Purpose .............................................    7
   1.4.  Motivation ..........................................    8
2.  NAI Definition ...........................................    9
   2.1.  UTF-8 Syntax and Normalization ......................    9
   2.2.  Formal Syntax .......................................   10
   2.3.  NAI Length Considerations ...........................   10
   2.4.  Support for Username Privacy ........................   11
   2.5.  International Character Sets ........................   11
   2.6.  The Normalization Process ...........................   12
      2.6.1.  Issues with the Normalization Process ..........   13
   2.7.  Use in Other Protocols ..............................   14
   2.8.  Using the NAI format for other identifiers ..........   15
3.  Routing inside of AAA Systems ............................   16
   3.1.  Compatibility with Email Usernames ..................   17
   3.2.  Compatibility with DNS ..............................   17
   3.3.  Realm Construction ..................................   18
      3.3.1.  Historical Practices ...........................   19
   3.4.  Examples ............................................   19
4.  Security Considerations ..................................   20
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