Security Policy Translation in Interface to Network Security Functions
draft-yang-i2nsf-security-policy-translation-01

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Last updated 2018-07-17
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I2NSF Working Group                                              J. Yang
Internet-Draft                                                  J. Jeong
Intended status: Informational                                    J. Kim
Expires: January 18, 2019                        Sungkyunkwan University
                                                           July 17, 2018

 Security Policy Translation in Interface to Network Security Functions
            draft-yang-i2nsf-security-policy-translation-01

Abstract

   This document proposes a scheme of security policy translation (i.e.,
   Security Policy Translator) in Interface to Network Security
   Functions (I2NSF) Framework.  When I2NSF User delivers a high-level
   security policy for a security service, Security Policy Translator in
   Security Controller translates it into a low-level security policy
   for Network Security Functions (NSFs).

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
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   This Internet-Draft will expire on January 18, 2019.

Copyright Notice

   Copyright (c) 2018 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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   (https://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

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   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   2
   3.  Necessity for Policy Translator . . . . . . . . . . . . . . .   2
   4.  Design of Policy Translator . . . . . . . . . . . . . . . . .   3
     4.1.  Overall Structure of Policy Translator  . . . . . . . . .   3
     4.2.  DFA-based Data Extractor  . . . . . . . . . . . . . . . .   6
     4.3.  Data Converter  . . . . . . . . . . . . . . . . . . . . .   6
     4.4.  Context-free Grammar-based Policy Generator . . . . . . .   7
   5.  Features of Policy Translator Design  . . . . . . . . . . . .   7
   6.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Informative References  . . . . . . . . . . . . . . . . . . .   8
   Appendix A.  Changes from draft-yang-i2nsf-security-policy-
                translation-00 . . . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   This document defines a scheme of a security policy translation in
   Interface to Network Security Functions (I2NSF) Framework [RFC8329].
   First of all, this document explains the necessity of a security
   policy translator (shortly called policy translator) in the I2NSF
   framework.

   The policy translator resides in Security Controller in the I2NSF
   framework and translates a high-level security policy to a low-level
   security policy for Network Security Functions (NSFs).  A high-level
   policy is specified by I2NSF User in the I2NSF framework and is
   delivered to Security Controller via Consumer-Facing Interface
   [consumer-facing-inf-dm].  A low-level policy is translated by Policy
   Translator in Security Controller and is delivered to NSFs to execute
   the rules corresponding to the low-level policy via NSF-Facing
   Interface [nsf-facing-inf-dm].

2.  Terminology

   This document uses the terminology specified in [i2nsf-terminology]
   [RFC8329].

3.  Necessity for Policy Translator

   Security Controller acts as a coordinator between I2NSF User and
   NSFs.  Also, Security Controller has capability information of NSFs

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   that are registered via Registration Interface [registration-inf-dm]
   by Developer's Management System [RFC8329].

   As a coordinator, Security Controller needs to generate a low-level
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