Interface to Network Security Functions (I2NSF): Problem Statement and Use Cases
RFC 8192

Document Type RFC - Informational (July 2017; No errata)
Last updated 2017-07-25
Replaces draft-kumar-i2nsf-controller-use-cases, draft-hares-i2nsf-merged-problem-use-cases
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Internet Engineering Task Force (IETF)                          S. Hares
Request for Comments: 8192                                        Huawei
Category: Informational                                         D. Lopez
ISSN: 2070-1721                                           Telefonica I+D
                                                                M. Zarny
                                                                 vArmour
                                                            C. Jacquenet
                                                          France Telecom
                                                                R. Kumar
                                                        Juniper Networks
                                                                J. Jeong
                                                 Sungkyunkwan University
                                                               July 2017

            Interface to Network Security Functions (I2NSF):
                    Problem Statement and Use Cases

Abstract

   This document sets out the problem statement for Interface to Network
   Security Functions (I2NSF) and outlines some companion use cases.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc8192.

Hares, et al.                 Informational                     [Page 1]
RFC 8192           I2NSF Problem Statement & Use Cases         July 2017

Copyright Notice

   Copyright (c) 2017 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
   (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
   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.

Hares, et al.                 Informational                     [Page 2]
RFC 8192           I2NSF Problem Statement & Use Cases         July 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Problem Space . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Challenges Facing Security Service Providers  . . . . . .   6
       3.1.1.  Diverse Types of Security Functions . . . . . . . . .   6
       3.1.2.  Diverse Interfaces to Control and Monitor NSFs  . . .   8
       3.1.3.  More Distributed NSFs and vNSFs . . . . . . . . . . .   8
       3.1.4.  More Demand to Control NSFs Dynamically . . . . . . .   9
       3.1.5.  Demand for Multi-tenancy to Control and Monitor NSFs    9
       3.1.6.  Lack of Characterization of NSFs and Capability
               Exchange  . . . . . . . . . . . . . . . . . . . . . .   9
       3.1.7.  Lack of Mechanism for NSFs to Utilize External
               Profiles  . . . . . . . . . . . . . . . . . . . . . .  10
       3.1.8.  Lack of Mechanisms to Accept External Alerts to
               Trigger Automatic Rule and Configuration Changes  . .  10
       3.1.9.  Lack of Mechanism for Dynamic Key Distribution to
               NSFs  . . . . . . . . . . . . . . . . . . . . . . . .  10
     3.2.  Challenges Facing Customers . . . . . . . . . . . . . . .  12
       3.2.1.  NSFs from Heterogeneous Administrative Domains  . . .  12
       3.2.2.  Today's Vendor-Specific Control Requests  . . . . . .  13
       3.2.3.  Difficulty for Customers to Monitor the Execution of
               Desired Policies  . . . . . . . . . . . . . . . . . .  14
     3.3.  Lack of Standard Interface to Inject Feedback to NSF  . .  15
     3.4.  Lack of Standard Interface for Capability Negotiation . .  15
     3.5.  Difficulty in Validating Policies across Multiple Domains  15
     3.6.  Software-Defined Networks . . . . . . . . . . . . . . . .  16
   4.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .  17
     4.1.  Basic Framework . . . . . . . . . . . . . . . . . . . . .  17
     4.2.  Access Networks . . . . . . . . . . . . . . . . . . . . .  18
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