The Network Access Identifier
draft-ietf-radext-nai-00

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Network Working Group                                        DeKok, Alan
INTERNET-DRAFT                                                FreeRADIUS
Obsoletes: 4282
Category: Standards Track
<draft-ietf-radext-nai-00.txt>
22 December 2012

                     The Network Access Identifier
                        draft-ietf-radext-nai-00

Abstract

   In order to provide roaming services, it is necessary to have a
   standardized method for identifying users.  This document defines the
   syntax for the Network Access Identifier (NAI), the user identity
   submitted by the client during network authentication.  "Roaming" may
   be loosely defined as the ability to use any one of multiple Internet
   Service Providers (ISPs), while maintaining a formal, customer-vendor
   relationship with only one.  Examples of where roaming capabilities
   might be required include ISP "confederations" and ISP-provided
   corporate network access support.  This document is a revised version
   of RFC 4282 [RFC4282], 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
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on February 28, 2013.

DeKok, Alan                  Standards Track                    [Page 1]
INTERNET-DRAFT        The Network Access Identifier     22 December 2012

Copyright Notice

   Copyright (c) 2012 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
   Provisions Relating to IETF Documents
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   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008. The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
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   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

DeKok, Alan                  Standards Track                    [Page 2]
INTERNET-DRAFT        The Network Access Identifier     22 December 2012

Table of Contents

Appendix A - Changes from RFC4282 ............................    3
1.  Introduction .............................................    4
   1.1.  Terminology .........................................    4
   1.2.  Requirements Language ...............................    5
   1.3.  Purpose .............................................    6
   1.4.  Motivation ..........................................    6
2.  NAI Definition ...........................................    7
   2.1.  UTF-8 Syntax and Normalization ......................    7
   2.2.  Formal Syntax .......................................    7
   2.3.  NAI Length Considerations ...........................    8
   2.4.  Support for Username Privacy ........................    8
   2.5.  International Character Sets ........................    9
   2.6.  The Normalization Process ...........................   10
   2.7.  Routing inside of AAA Systems .......................   10
   2.8.  Compatibility with Email Usernames ..................   11
   2.9.  Compatibility with DNS ..............................   11
   2.10.  Realm Construction .................................   12
      2.10.1.  Historical Practices ..........................   13
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