An IKEv2 Extension for Supporting ERP
draft-nir-ipsecme-erx-03

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Document Type Active Internet-Draft (individual)
Authors Yoav Nir  , Qin Wu 
Last updated 2012-04-12
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Network Working Group                                             Y. Nir
Internet-Draft                                               Check Point
Intended status: Standards Track                                   Q. Wu
Expires: October 14, 2012                                         Huawei
                                                          April 12, 2012

                 An IKEv2 Extension for Supporting ERP
                        draft-nir-ipsecme-erx-03

Abstract

   This document describes an extension to the IKEv2 protocol that
   allows an IKE Security Association (SA) to be created and
   authenticated using the EAP Re-authentication Protocol extension as
   described in RFC 5296bis.

   NOTE TO RFC EDITOR: Replace 5296bis in the previous paragraph with
   the RFC number assigned to that document.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on October 14, 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
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   (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
   to this document.  Code Components extracted from this document must

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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.

1.  Introduction

   IKEv2, as specified in section 2.16 of [RFC5996], allows
   authentication of the initiator using an EAP method.  Using EAP
   significantly increases the count of round-trips required to
   establish the IPsec SA, and also may require user interaction.  This
   makes it inconvenient to allow a single remote access client to
   create multiple IPsec tunnels with multiple IPsec gateways that
   belong to the same domain.

   The EAP Re-authentication Protocol (ERP), as described in
   [RFC5296bis], allows an EAP peer to authenticate to multiple
   authenticators, while performing the full EAP method only once.
   Subsequent authentications require fewer round-trips and no user
   interaction.

   Bringing these two technologies together allows a remote access IPsec
   client to create multiple tunnels with different gateways that belong
   to a single domain, as well as using the keys from other contexts of
   using EAP, such as network access within the same domain, to
   transparently connect to VPN gateways within this domain.

1.1.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

2.  Usage Scenarios

   This work is motivated by the following several scenarios.
   o  Multiple tunnels for a single remote access VPN client.  Suppose a
      company has offices in New York City, Paris, and Shanghai.  For
      historical reasons, the email server is located in the Paris
      office, while most of the servers hosting the company's intranet
      are located in Shanghai, and the finance department servers are in
      NYC.  An employee using remote access VPN may need to connect to
      servers from all three locations.  While it is possible to connect
      to a single gateway, and have that gateway route the requests to
      the other gateways (perhaps through site-2-site VPN), this is not
      efficient, and it is more desirable to have the client initiate
      three different tunnels.  It is, however, not desirable to have

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      the user type in a password three times.
   o  Roaming.  In these days of mobile phones and tablets, users often
      move from the wireless LAN in their office, where access may be
      granted through 802.1x, to a cellular network where VPN is
      necessary and back again.  Both the VPN server and the 802.1x
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