Security Policy Translation in Interface to Network Security Functions
draft-yang-i2nsf-security-policy-translation-00

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Network Working Group                                            J. Yang
Internet-Draft                                                  J. Jeong
Intended status: Informational                                    J. Kim
Expires: January 3, 2019                         Sungkyunkwan University
                                                            July 2, 2018

 Security Policy Translation in Interface to Network Security Functions
            draft-yang-i2nsf-security-policy-translation-00

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

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   Copyright (c) 2018 IETF Trust and the persons identified as the
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   This document is subject to BCP 78 and the IETF Trust's Legal

Yang, et al.             Expires January 3, 2019                [Page 1]
Internet-Draft      I2NSF Security Policy Translation          July 2018

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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
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 3
   3.  Necessity for Policy Translator . . . . . . . . . . . . . . . . 3
   4.  Design of Policy Translator . . . . . . . . . . . . . . . . . . 4
     4.1.  Overall Structure of Policy Translator  . . . . . . . . . . 4
     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

Yang, et al.             Expires January 3, 2019                [Page 2]
Internet-Draft      I2NSF Security Policy Translation          July 2018

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
   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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