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