Skip to main content

I2NSF Registration Interface YANG Data Model
draft-ietf-i2nsf-registration-interface-dm-04

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Active".
Authors Sangwon Hyun , Jaehoon Paul Jeong , TaeKyun Roh , Sarang Wi , Park Jung-Soo
Last updated 2019-06-12 (Latest revision 2019-03-28)
RFC stream Internet Engineering Task Force (IETF)
Formats
Reviews
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state I-D Exists
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)
draft-ietf-i2nsf-registration-interface-dm-04
I2NSF Working Group                                              S. Hyun
Internet-Draft                                         Chosun University
Intended status: Standards Track                                J. Jeong
Expires: December 14, 2019                                        T. Roh
                                                                   S. Wi
                                                 Sungkyunkwan University
                                                                 J. Park
                                                                    ETRI
                                                           June 12, 2019

              I2NSF Registration Interface YANG Data Model
             draft-ietf-i2nsf-registration-interface-dm-04

Abstract

   This document defines an information model and a YANG data model for
   Registration Interface between Security Controller and Developer's
   Management System (DMS) in the Interface to Network Security
   Functions (I2NSF) framework to register Network Security Functions
   (NSF) of the DMS into the Security Controller.  The objective of
   these information and data models is to support NSF capability
   registration and query via I2NSF Registration Interface.

Editorial Note (To be removed by RFC Editor)

   Please update these statements within the document with the RFC
   number to be assigned to this document:

      "This version of this YANG module is part of RFC XXXX;"

      "RFC XXXX: I2NSF Registration Interface YANG Data Model"

      "reference: RFC XXXX"

   Please update the "revision" date of the YANG module.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

Hyun, et al.            Expires December 14, 2019               [Page 1]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on December 14, 2019.

Copyright Notice

   Copyright (c) 2019 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
   (https://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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Objectives  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   5.  Information Model . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  NSF Capability Registration . . . . . . . . . . . . . . .   5
       5.1.1.  NSF Capability Information  . . . . . . . . . . . . .   6
       5.1.2.  NSF Access Information  . . . . . . . . . . . . . . .   8
     5.2.  NSF Capability Query  . . . . . . . . . . . . . . . . . .   8
   6.  Data Model  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     6.1.  YANG Tree Diagram . . . . . . . . . . . . . . . . . . . .   8
       6.1.1.  Definition of Symbols in Tree Diagrams  . . . . . . .   9
       6.1.2.  I2NSF Registration Interface  . . . . . . . . . . . .   9
       6.1.3.  NSF Capability Information  . . . . . . . . . . . . .  11
       6.1.4.  NSF Access Information  . . . . . . . . . . . . . . .  11
     6.2.  YANG Data Modules . . . . . . . . . . . . . . . . . . . .  12
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  17
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  18
   Appendix A.  XML Example of Registration Interface Data Model . .  20
     A.1.  Example 1: Registration for Capabilities of General
           Firewall  . . . . . . . . . . . . . . . . . . . . . . . .  20

Hyun, et al.            Expires December 14, 2019               [Page 2]
Internet-Draft   Registration Interface YANG Data Model        June 2019

     A.2.  Example 2: Registration for Capabilities of Time based
           Firewall  . . . . . . . . . . . . . . . . . . . . . . . .  21
     A.3.  Example 3: Registration for Capabilities of Web Filter  .  23
     A.4.  Example 4: Registration for Capabilities of VoIP/VoLTE
           Filter  . . . . . . . . . . . . . . . . . . . . . . . . .  25
     A.5.  Example 5: Registration for Capabilities of HTTP and
           HTTPS Flood Mitigation  . . . . . . . . . . . . . . . . .  26
     A.6.  Example 6: Query for Capabilities of Time based Firewall   28
   Appendix B.  NSF Lifecycle Managmenet in NFV Environments . . . .  30
   Appendix C.  Changes from draft-ietf-i2nsf-registration-
                interface-dm-03  . . . . . . . . . . . . . . . . . .  30
   Appendix D.  Acknowledgments  . . . . . . . . . . . . . . . . . .  30
   Appendix E.  Contributors . . . . . . . . . . . . . . . . . . . .  30
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  31

1.  Introduction

   A number of Network Security Functions (NSF) may exist in the
   Interface to Network Security Functions (I2NSF) framework [RFC8329].
   Since each of these NSFs likely has different security capabilities
   from each other, it is important to register the security
   capabilities of the NSF into the security controller.  In addition,
   it is required to search NSFs of some required security capabilities
   on demand.  As an example, if additional security capabilities are
   required to serve some security service request(s) from an I2NSF
   user, the security controller should be able to request the DMS for
   NSFs that have the required security capabilities.

   This document describes an information model (see Section 5) and a
   YANG [RFC7950] data model (see Section 6) for the I2NSF Registration
   Interface [RFC8329] between the security controller and the
   developer's management system (DMS) to support NSF capability
   registration and query via the registration interface.  It also
   describes the operations which should be performed by the security
   controller and the DMS via the Registration Interface using the
   defined model.

2.  Requirements Language

   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].

3.  Terminology

   This document uses the following terms defined in
   [i2nsf-terminology], [capability-dm], [RFC8329],
   [supa-policy-data-model], and [supa-policy-info-model]

Hyun, et al.            Expires December 14, 2019               [Page 3]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   o  Network Security Function (NSF): A function that is responsible
      for specific treatment of received packets.  A Network Security
      Function can act at various layers of a protocol stack (e.g., at
      the network layer or other OSI layers).  Sample Network Security
      Service Functions are as follows: Firewall, Intrusion Prevention/
      Detection System (IPS/IDS), Deep Packet Inspection (DPI),
      Application Visibility and Control (AVC), network virus and
      malware scanning, sandbox, Data Loss Prevention (DLP), Distributed
      Denial of Service (DDoS) mitigation and TLS proxy.

   o  Data Model: A data model is a representation of concepts of
      interest to an environment in a form that is dependent on data
      repository, data definition language, query language,
      implementation language, and protocol. [supa-policy-info-model]

   o  Information Model: An information model is a representation of
      concepts of interest to an environment in a form that is
      independent of data repository, data definition language, query
      language, implementation language, and protocol.
      [supa-policy-info-model]

   o  YANG: This document follows the guidelines of [RFC6087], uses the
      common YANG types defined in [RFC6991], and adopts the Network
      Management Datastore Architecture (NMDA).  The meaning of the
      symbols in tree diagrams is defined in [RFC8340].

4.  Objectives

   o  Registering NSFs to I2NSF framework: Developer's Management System
      (DMS) in I2NSF framework is typically run by an NSF vendor, and
      uses Registration Interface to provide NSFs developed by the NSF
      vendor to Security Controller.  DMS registers NSFs and their
      capabilities to I2NSF framework through Registration Interface.
      For the registered NSFs, Security Controller maintains a catalog
      of the capabilities of those NSFs.

   o  Updating the capabilities of registered NSFs: After an NSF is
      registered into Security Controller, some modifications on the
      capability of the NSF may be required later.  In this case, DMS
      uses Registration Interface to update the capability of the NSF,
      and this update should be reflected on the catalog of NSFs.

   o  Querying DMS about some required capabilities: Security Controller
      may need some additional capabilities to serve the security
      service request from an I2NSF user, but none of the registered
      NSFs has the required capabilities.  In this case, Security
      Controller may query DMS about NSF(s) that can provide the
      required capabilities via Registration Interface.

Hyun, et al.            Expires December 14, 2019               [Page 4]
Internet-Draft   Registration Interface YANG Data Model        June 2019

5.  Information Model

   The I2NSF registration interface is used by Security Controller and
   Developer's Management System (DMS) in I2NSF framework.  The
   following summarizes the operations done through the registration
   interface:

   1)  DMS registers NSFs and their capabilities to Security Controller
       via the registration interface.  DMS also uses the registration
       interface to update the capabilities of the NSFs registered
       previously.

   2)  In case that Security Controller fails to find any registered NSF
       that can provide some required capabilities, Security Controller
       queries DMS about NSF(s) having the required capabilities via the
       registration interface.

   Figure 1 shows the information model of the I2NSF registration
   interface, which consists of two submodels: NSF capability
   registration and NSF capability query.  Each submodel is used for the
   operations listed above.  The remainder of this section will provide
   in-depth explanations of each submodel.

     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |      I2NSF Registration Interface Information Model       |
     |                                                           |
     |         +-+-+-+-+-+-+-+-+-+  +-+-+-+-+-+-+-+-+-+          |
     |         | NSF Capability  |  | NSF Capability  |          |
     |         | Registration    |  | Query           |          |
     |         +-+-+-+-+-+-+-+-+-+  +-+-+-+-+-+-+-+-+-+          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

         Figure 1: I2NSF Registration Interface Information Model

5.1.  NSF Capability Registration

   This submodel is used by DMS to register an NSF to Security
   Controller.  Figure 2 shows how this submodel is constructed.  The
   most important part in Figure 2 is the NSF capability, and this
   specifies the set of capabilities that the NSF to be registered can
   offer.  The NSF Name contains a unique name of this NSF with the
   specified set of capabilities.  When registering the NSF, DMS
   additionally includes the network access information of the NSF which
   is required to enable network communications with the NSF.

   The following will further explain the NSF capability information and
   the NSF access information in more detail.

Hyun, et al.            Expires December 14, 2019               [Page 5]
Internet-Draft   Registration Interface YANG Data Model        June 2019

                              +-+-+-+-+-+-+-+-+-+
                              | NSF Capability  |
                              | Registration    |
                               +-+-+-+-^-+-+-+-+-+
                                       |
                 +---------------------+--------------------+
                 |                     |                    |
                 |                     |                    |
            +-+-+-+-+-+-+        +-+-+-+-+-+-+-+-+     +-+-+-+-+-+-+-+
            |   NSF     |        | NSF Capability|     | NSF Access  |
            |   Name    |        | Information   |     | Information |
            +-+-+-+-+-+-+        +-+-+-+-+-+-+-+-+     +-+-+-+-+-+-+-+

              Figure 2: NSF Capability Registration Sub-Model

5.1.1.  NSF Capability Information

   NSF Capability Information basically describes the security
   capabilities of an NSF.  In Figure 3, we show capability objects of
   an NSF.  Following the information model of NSF capabilities defiend
   in [capability-dm], we share the same I2NSF security capabilities:
   Time Capabilities, Event Capabilities, Condition Capabilities, Action
   Capabilities, Resolution Strategy Capabilities, Default Action
   Capabilities, and IPsec Method.  Also, NSF Capability Information
   additionally contains the performance capabilities of an NSF as shown
   in Figure 3.

Hyun, et al.            Expires December 14, 2019               [Page 6]
Internet-Draft   Registration Interface YANG Data Model        June 2019

                           +-+-+-+-+-+-+-+-+-+
                           | NSF Capability  |
                           |   Information   |
                           +-+-+-+-^-+-+-+-+-+
                                   |
                                   |
            +----------------------+----------------------+
            |                                             |
            |                                             |
    +-+-+-+-+-+-+-+-+                             +-+-+-+-+-+-+-+-+
    |    I2NSF      |                             |  Performance  |
    | Capabilities  |                             |  Capabilities |
    +-+-+-+-+-+-+-+-+                             +-+-+-+-+-+-+-+-+
           |
     +--+-----------------+------------------+-----------------+-------+
     |                    |                  |                 |       |
 +-+-+-+-+-+-+-+   +-+-+-+-+-+-+-+   +-+-+-+-+-+-+-+   +-+-+-+-+-+-+-+ |
 |     Time    |   |    Event    |   |  Condition  |   |   Action    | |
 | Capabilities|   | Capabilities|   | Capabilities|   | Capabilities| |
 +-+-+-+-+-+-+-+   +-+-+-+-+-+-+-+   +-+-+-+-+-+-+-+   +-+-+-+-+-+-+-+ |
                                                                       |
                   +----------------------+--------------------+-------+
                   |                      |                    |
             +-+-+-+-+-+-+-+       +-+-+-+-+-+-+-+       +-+-+-+-+-+-+
             | Resolution  |       |   Default   |       |   IPsec   |
             | Strategy    |       |   Action    |       |   Method  |
             | Capabilities|       | Capabilities|       +-+-+-+-+-+-+
             +-+-+-+-+-+-+-+       +-+-+-+-+-+-+-+

                   Figure 3: NSF Capability Information

5.1.1.1.  Performance Capabilities

   This information represents the processing capability of an NSF.
   This information can be used to determine whether the NSF is in
   congestion by comparing this with the workload that the NSF currently
   undergoes.  Moreover, this information can specify an available
   amount of each type of resources such as processing power which are
   available on the NSF.  (The registration interface can control the
   usages and limitations of the created instance and make the
   appropriate request according to the status.)  As illustrated in
   Figure 4, this information consists of two items: Processing and
   Bandwidth.  Processing information describes the NSF's available
   processing power.  Bandwidth describes the information about
   available network amount in two cases, outbound, inbound.  This two
   information can be used for the NSF's instance request.

Hyun, et al.            Expires December 14, 2019               [Page 7]
Internet-Draft   Registration Interface YANG Data Model        June 2019

                            +-+-+-+-+-+-+-+-+-+
                            |   Performance   |
                            |   Capabilities  |
                            +-+-+-+-^-+-+-+-+-+
                                    |
                        +----------------------------+
                        |                            |
                        |                            |
                +-+-+-+-+-+-+-+-+            +-+-+-+-+-+-+-+
                |  Processing   |            |  Bandwidth  |
                +-+-+-+-+-+-+-+-+            +-+-+-+-+-+-+-+

                 Figure 4: Performance Capability Overview

5.1.2.  NSF Access Information

   NSF Access Information contains the followings that are required to
   communicate with an NSF: IPv4 address, IPv6 address, port number, and
   supported transport protocol(s) (e.g., Virtual Extensible LAN (VXLAN)
   [RFC 7348], Generic Protocol Extension for VXLAN (VXLAN-GPE)
   [draft-ietf-nvo3-vxlan-gpe], Generic Route Encapsulation (GRE),
   Ethernet etc.).  In this document, NSF Access Information is used to
   identify a specific NSF instance (i.e.  NSF Access Information is the
   signature(unique identifier) of an NSF instance in the overall
   system).

5.2.  NSF Capability Query

   Security Controller may require some additional capabilities to serve
   the security service request from an I2NSF user, but none of the
   registered NSFs has the required capabilities.  In this case,
   Security Controller makes a description of the required capabilities
   by using the NSF capability information sub-model in Section 5.1.1,
   and sends DMS a query about which NSF(s) can provide these
   capabilities.

6.  Data Model

6.1.  YANG Tree Diagram

   This section provides the YANG Tree diagram of the I2NSF registration
   interface.

Hyun, et al.            Expires December 14, 2019               [Page 8]
Internet-Draft   Registration Interface YANG Data Model        June 2019

6.1.1.  Definition of Symbols in Tree Diagrams

   A simplified graphical representation of the data model is used in
   this section.  The meaning of the symbols used in the following
   diagrams [RFC8431] is as follows:

      Brackets "[" and "]" enclose list keys.

      Abbreviations before data node names: "rw" means configuration
      (read-write) and "ro" state data (read-only).

      Symbols after data node names: "?" means an optional node and "*"
      denotes a "list" and "leaf-list".

      Parentheses enclose choice and case nodes, and case nodes are also
      marked with a colon (":").

      Ellipsis ("...") stands for contents of subtrees that are not
      shown.

6.1.2.  I2NSF Registration Interface

           module : ietf-i2nsf-reg-interface
                 +--rw nsf-capability-registration
                 |  uses i2nsf-nsf-registrations

           rpcs :
                 +---x nsf-capability-query
                 |  uses i2nsf-nsf-capability-query

            Figure 5: YANG tree of I2NSF Registration Interface

   The I2NSF registration interface is used for the following purposes.
   Developer's Management System (DMS) registers NSFs and their
   capabilities into Security Controller via the registration interface.
   In case that Security Controller fails to find any NSF among the
   registered NSFs which can provide some required capabilities,
   Security Controller uses the registration interface to query DMS
   about NSF(s) having the required capabilities.  The following
   sections describe the YANG data models to support these operations.

6.1.2.1.  NSF Capability Registration

   This section expands the i2nsf-nsf-registrations in Figure 5.

Hyun, et al.            Expires December 14, 2019               [Page 9]
Internet-Draft   Registration Interface YANG Data Model        June 2019

         NSF Capability Registration
          +--rw i2nsf-nsf-registrations
              +--rw i2nsf-nsf-capability-registration*  [nsf-name]
                 +--rw nsf-name                             string
                 +--rw nsf-capability-info
                 |  uses i2nsf-nsf-capability-info
                 +--rw nsf-access-info
                 |  uses i2nsf-nsf-access-info

            Figure 6: YANG tree of NSF Capability Registration

   When registering an NSF to Security Controller, DMS uses this module
   to describe what capabilities the NSF can offer.  DMS includes the
   network access information of the NSF which is required to make a
   network connection with the NSF as well as the capability description
   of the NSF.

6.1.2.2.  NSF Capability Query

   This section expands the i2nsf-nsf-capability-query in Figure 5.

         NSF Capability Query
           +---x i2nsf-nsf-capability-query
               +---w input
               |  +---w query-i2nsf-capability-info
               |  |   uses ietf-i2nsf-capability
               +--ro output
                   +--ro nsf-access-info
                   |  uses i2nsf-nsf-access-info

                Figure 7: YANG tree of NSF Capability Query

   Security Controller may require some additional capabilities to
   provide the security service requested by an I2NSF user, but none of
   the registered NSFs has the required capabilities.  In this case,
   Security Controller makes a description of the required capabilities
   using this module and then queries DMS about which NSF(s) can provide
   these capabilities.  Use NETCONF RPCs to send a NSF capability query.
   Input data is query-i2nsf-capability-info and output data is nsf-
   access-info.  In Figure 7, the ietf-i2nsf-capability refers to the
   module defined in [capability-dm].

Hyun, et al.            Expires December 14, 2019              [Page 10]
Internet-Draft   Registration Interface YANG Data Model        June 2019

6.1.3.  NSF Capability Information

   This section expands the i2nsf-nsf-capability-info in Figure 6 and
   Figure 7.

         NSF Capability Information
           +--rw i2nsf-nsf-capability-info
             +--rw i2nsf-capability
             |  uses ietf-i2nsf-capability
             +--rw nsf-performance-capability
             |  uses i2nsf-nsf-performance-capability

          Figure 8: YANG tree of I2NSF NSF Capability Information

   In Figure 8, the ietf-i2nsf-capability refers to the module defined
   in [capability-dm].  The i2nsf-nsf-performance-capability is used to
   specify the performance capability of an NSF.

6.1.3.1.  NSF Performance Capability

   This section expands the i2nsf-nsf-performance-capability in
   Figure 8.

         NSF Performance Capability
           +--rw i2nsf-nsf-performance-capability
            +--rw processing
            |   +--rw processing-average  uint16
            |   +--rw processing-peak     uint16
            +--rw bandwidth
            |   +--rw outbound
            |   |  +--rw outbound-average  uint16
            |   |  +--rw outbound-peak     uint16
            |   +--rw inbound
            |   |  +--rw inbound-average   uint16
            |   |  +--rw inbound-peak      uint16

          Figure 9: YANG tree of I2NSF NSF Performance Capability

   This module is used to specify the performance capabilities of an NSF
   when registering or initiating the NSF.

6.1.4.  NSF Access Information

   This section expands the i2nsf-nsf-access-info in Figure 6.

Hyun, et al.            Expires December 14, 2019              [Page 11]
Internet-Draft   Registration Interface YANG Data Model        June 2019

         NSF Access Information
           +--rw i2nsf-nsf-access-info
             +--rw nsf-instance-name      string
             +--rw nsf-address            inet:ipv4-address
             +--rw nsf-port-number        inet:port-number

           Figure 10: YANG tree of I2NSF NSF Access Informantion

   This module contains the network access information of an NSF that is
   required to enable network communications with the NSF.

6.2.  YANG Data Modules

   This section provides YANG modules of the data model for the
   registration interface between Security Controller and Developer's
   Management System, as defined in Section 5.

       <CODE BEGINS> file "ietf-i2nsf-reg-interface@2019-06-12.yang"

     module ietf-i2nsf-reg-interface{
     yang-version 1.1;
     namespace
     "urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface";
     prefix "iiregi";

         import ietf-inet-types{
            prefix inet;
            reference "RFC 6991";
         }
         import ietf-i2nsf-capability{
           prefix capa;
           reference "draft-ietf-i2nsf-capability
                   -data-model-04";
          }
         organization
           "IETF I2NSF (Interface to Network Security Functions)
           Working Group";

         contact
        "WG Web: <http://tools.ietf.org/wg/i2nsf>

           WG List: <mailto:i2nsf@ietf.org>

           WG Chair: Linda Dunbar
           <mailto:Linda.duhbar@huawei.com>

           Editor: Sangwon Hyun
           <mailto:swhyun77@skku.edu>

Hyun, et al.            Expires December 14, 2019              [Page 12]
Internet-Draft   Registration Interface YANG Data Model        June 2019

           Editor: Jaehoon Paul Jeong
           <mailto:pauljeong@skku.edu>

           Editor: Taekyun Roh
           <mailto:tkroh0198@skku.edu>

           Editor: Sarang Wi
           <mailto:dnl9795@skku.edu>

           Editor: Jung-Soo Park
           <mailto:pjs@etri.re.kr>";

         description

          "It defines a YANG data model for Registration Interface.
          Copyright (c) 2018 IETF Trust and the persons identified as
          authors of the code. All rights reserved.

          Redistribution and use in source and binary forms, with or
          without modification, is permitted pursuant to, and subject
          to the license terms contained in, the Simplified BSD License
          set forth in Section 4.c of the IETF Trust's Legal Provisions
          Relating to IETF Documents
          (http://trustee.ietf.org/license-info).

          This version of this YANG module is part of RFC XXXX; see
          the RFC itself for full legal notices.";

         revision 2019-06-12 {
           description "The third revision";
           reference
             "RFC XXXX: I2NSF Registration Interface YANG Data Model";
         }
         rpc i2nsf-nsf-capability-query {
            description
              "Capability information that the
               Security Controller
               sends to the DMS";
            input{
               container query-i2nsf-capability-info {
                 description
                 "i2nsf capability information";
                 uses "capa:nsf-capabilities";
                 reference
                   "draft-ietf-i2nsf-capability
                         -data-model-04";
                 }

Hyun, et al.            Expires December 14, 2019              [Page 13]
Internet-Draft   Registration Interface YANG Data Model        June 2019

             }
             output{
                 container nsf-access-info {
                   description
                   "nsf access information";
                   uses i2nsf-nsf-access-info;

                  }
              }
         }
         container i2nsf-nsf-registrations{
         description
          "i2nsf-nsf-registrations";
          list i2nsf-nsf-capability-registration {
            key "nsf-name";
            description
             "Requeired information for registration";
             leaf nsf-name {
               type string;
               mandatory true;
               description
                 "nsf-name";
             }
             container nsf-capability-info {
               description
                 "nsf-capability-information";
                 uses i2nsf-nsf-capability-info;
             }
             container nsf-access-info {
               description
                 "nsf-access-info";
                 uses i2nsf-nsf-access-info;
             }
           }
         }

         grouping i2nsf-nsf-performance-capability {
            description
             "NSF performance capailities";
            container processing{
              description
               "processing info";
              leaf processing-average{
               type uint16;
               description
                "processing-average";
              }
              leaf processing-peak{

Hyun, et al.            Expires December 14, 2019              [Page 14]
Internet-Draft   Registration Interface YANG Data Model        June 2019

               type uint16;
               description
                "processing peak";
              }
           }
           container bandwidth{
             description
               "bandwidth info";

             container outbound{
               description
                  "outbound";
               leaf outbound-average{
                   type uint16;
                   description
                    "outbound-average";
               }
               leaf outbound-peak{
                    type uint16;
                    description
                     "outbound-peak";
                }
            }
            container inbound{
              description
               "inbound";
              leaf inbound-average{
                 type uint16;
                 description
                  "inbound-average";
              }
              leaf inbound-peak{
                  type uint16;
                  description
                   "inbound-peak";
              }
            }
          }
        }
        grouping i2nsf-nsf-capability-info {
          description
           "Detail information of an NSF";
          container i2nsf-capability {
            description
             "ietf i2nsf capability information";
            uses "capa:nsf-capabilities";
            reference "draft-ietf-i2nsf-capability
                 -data-model-04";

Hyun, et al.            Expires December 14, 2019              [Page 15]
Internet-Draft   Registration Interface YANG Data Model        June 2019

          }
          container nsf-performance-capability {
             description
              "performance capability";
             uses i2nsf-nsf-performance-capability;
          }
        }

        grouping i2nsf-nsf-access-info {
          description
           "NSF access information";
          leaf nsf-instance-name {
            type string;
            description
              "nsf-instance-name";
          }
          leaf nsf-address {
            type inet:ipv4-address;
            mandatory true;
            description
              "nsf-address";
           }
           leaf nsf-port-address {
            type inet:port-number;
            description
             "nsf-port-address";
           }
        }
    }
           <CODE ENDS>

             Figure 11: Registration Interface YANG Data Model

7.  IANA Considerations

   This document requests IANA to register the following URI in the
   "IETF XML Registry" [RFC3688]:

       URI: urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface
       Registrant Contact: The IESG.
       XML: N/A; the requested URI is an XML namespace.

   This document requests IANA to register the following YANG module in
   the "YANG Module Names" registry [RFC7950].

Hyun, et al.            Expires December 14, 2019              [Page 16]
Internet-Draft   Registration Interface YANG Data Model        June 2019

       Name:      ietf-i2nsf-reg-interface
       Namespace: urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface
       Prefix:    iiregi
       Reference: RFC XXXX

8.  Security Considerations

   The YANG module specified in this document defines a data schema
   designed to be accessed through network management protocols such as
   NETCONF [RFC6241] or RESTCONF [RFC8040].  The lowest NETCONF layer is
   the secure transport layer, and the required secure transport is
   Secure Shell (SSH) [RFC6242].  The lowest RESTCONF layer is HTTPS,
   and the required secure transport is TLS [RFC8446].

   The NETCONF access control model [RFC8341] provides a means of
   restricting access to specific NETCONF or RESTCONF users to a
   preconfigured subset of all available NETCONF or RESTCONF protocol
   operations and content.

9.  References

9.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
              DOI 10.17487/RFC3688, January 2004,
              <https://www.rfc-editor.org/info/rfc3688>.

   [RFC6087]  Bierman, A., "Guidelines for Authors and Reviewers of YANG
              Data Model Documents", RFC 6087, DOI 10.17487/RFC6087,
              January 2011, <https://www.rfc-editor.org/info/rfc6087>.

   [RFC6241]  Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
              and A. Bierman, Ed., "Network Configuration Protocol
              (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
              <https://www.rfc-editor.org/info/rfc6241>.

   [RFC6242]  Wasserman, M., "Using the NETCONF Protocol over Secure
              Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
              <https://www.rfc-editor.org/info/rfc6242>.

Hyun, et al.            Expires December 14, 2019              [Page 17]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   [RFC6991]  Schoenwaelder, J., Ed., "Common YANG Data Types",
              RFC 6991, DOI 10.17487/RFC6991, July 2013,
              <https://www.rfc-editor.org/info/rfc6991>.

   [RFC7950]  Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
              RFC 7950, DOI 10.17487/RFC7950, August 2016,
              <https://www.rfc-editor.org/info/rfc7950>.

   [RFC8040]  Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
              Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
              <https://www.rfc-editor.org/info/rfc8040>.

   [RFC8340]  Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
              BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
              <https://www.rfc-editor.org/info/rfc8340>.

   [RFC8341]  Bierman, A. and M. Bjorklund, "Network Configuration
              Access Control Model", STD 91, RFC 8341,
              DOI 10.17487/RFC8341, March 2018,
              <https://www.rfc-editor.org/info/rfc8341>.

   [RFC8446]  Rescorla, E., "The Transport Layer Security (TLS) Protocol
              Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
              <https://www.rfc-editor.org/info/rfc8446>.

9.2.  Informative References

   [capability-dm]
              Hares, S., Jeong, J., Kim, J., Moskowitz, R., and Q. Lin,
              "I2NSF Capability YANG Data Model", draft-ietf-i2nsf-
              capability-data-model-05 (work in progress), June 2019.

   [draft-ietf-nvo3-vxlan-gpe]
              Maino, Ed., F., Kreeger, Ed., L., and U. Elzur, Ed.,
              "Generic Protocol Extension for VXLAN", draft-ietf-nvo3-
              vxlan-gpe-06 (work in progress), April 2018.

   [i2nsf-terminology]
              Hares, S., Strassner, J., Lopez, D., Xia, L., and H.
              Birkholz, "Interface to Network Security Functions (I2NSF)
              Terminology", draft-ietf-i2nsf-terminology-07 (work in
              progress), January 2019.

   [nfv-framework]
              "Network Functions Virtualisation (NFV); Architectureal
              Framework", ETSI GS NFV 002 ETSI GS NFV 002 V1.1.1,
              October 2013.

Hyun, et al.            Expires December 14, 2019              [Page 18]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   [RFC8329]  Lopez, D., Lopez, E., Dunbar, L., Strassner, J., and R.
              Kumar, "Framework for Interface to Network Security
              Functions", RFC 8329, February 2018.

   [RFC8431]  Wang, L., Chen, M., Dass, A., Ananthakrishnan, H., Kini,
              S., and N. Bahadur, "A YANG Data Model for Routing
              Information Base (RIB)", RFC 8431, September 2018.

   [supa-policy-data-model]
              Halpern, J., Strassner, J., and S. van der Meer, "Generic
              Policy Data Model for Simplified Use of Policy
              Abstractions (SUPA)", draft-ietf-supa-generic-policy-data-
              model-04 (work in progress), June 2017.

   [supa-policy-info-model]
              Strassner, J., Halpern, J., and S. van der Meer, "Generic
              Policy Information Model for Simplified Use of Policy
              Abstractions (SUPA)", draft-ietf-supa-generic-policy-info-
              model-03 (work in progress), May 2017.

Hyun, et al.            Expires December 14, 2019              [Page 19]
Internet-Draft   Registration Interface YANG Data Model        June 2019

Appendix A.  XML Example of Registration Interface Data Model

   This section describes XML examples of the I2NSF Registration
   Interface data model under the assumption of registering several
   types of NSFs and querying NSF capability.

A.1.  Example 1: Registration for Capabilities of General Firewall

   This section shows an XML example for registering the capabilities of
   general firewall.

        <i2nsf-nsf-registrations
          xmlns="urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface"
          xmlns:capa="urn:ietf:params:xml:ns:yang:ietf-i2nsf-capability">
           <i2nsf-nsf-capability-registration>
            <nsf-name>general_firewall_capability</nsf-name>
            <nsf-capability-info>
              <i2nsf-capability>
                <condition-capabilities>
                  <generic-nsf-capabilities>
                   <ipv4-capa>capa:ipv4-protocol</ipv4-capa>
                   <ipv4-capa>capa:exact-ipv4-address</ipv4-capa>
                   <ipv4-capa>capa:range-ipv4-address</ipv4-capa>
                   <tcp-capa>capa:exact-tcp-port-num</tcp-capa>
                   <tcp-capa>capa:range-tcp-port-num</tcp-capa>
                  </generic-nsf-capabilities>
               </condition-capabilities>
               <action-capabilities>
                 <ingress-action-capa>capa:pass</ingress-action-capa>
                 <ingress-action-capa>capa:drop</ingress-action-capa>
                 <ingress-action-capa>capa:alert</ingress-action-capa>
                 <egress-action-capa>capa:pass</egress-action-capa>
                 <egress-action-capa>capa:drop</egress-action-capa>
                 <egress-action-capa>capa:alert</egress-action-capa>
               </action-capabilities>
               <ipsec-method>capa:ikeless</ipsec-method>
              </i2nsf-capability>
              <nsf-performance-capability>
               <processing>
                <processing-average>1000</processing-average>
                <processing-peak>5000</processing-peak>
               </processing>
               <bandwidth>
                <outbound>
                  <outbound-average>1000</outbound-average>
                  <outbound-peak>5000</outbound-peak>
                </outbound>
                <inbound>

Hyun, et al.            Expires December 14, 2019              [Page 20]
Internet-Draft   Registration Interface YANG Data Model        June 2019

                  <inbound-average>1000</inbound-average>
                  <inbound-peak>5000</inbound-peak>
                </inbound>
               </bandwidth>
             </nsf-performance-capability>
           </nsf-capability-info>
           <nsf-access-info>
            <nsf-instance-name>general_firewall</nsf-instance-name>
            <nsf-address>221.159.112.100</nsf-address>
            <nsf-port-address>3000</nsf-port-address>
           </nsf-access-info>
          </i2nsf-nsf-capability-registration>
        </i2nsf-nsf-registrations>

     Figure 12: Configuration XML for Registration of General Firewall

   Figure 12 shows the configuration XML for registering the general
   firewall and its capabilities as follows.

   1.  The instance name of the NSF is general_firewall.

   2.  The NSF can inspect protocol, exact IPv4 address, and range IPv4
       address for IPv4 packets.

   3.  The NSF can inspect exact port number and range port number for
       tcp packets.

   4.  The NSF can determine whether the packets are allowed to pass,
       drop, or alert.

   5.  The NSF can support IPsec not through IKEv2, but through a
       Security Controller.

   6.  The NSF can have processing power and bandwidth.

   7.  The location of the NSF is 221.159.112.100.

   8.  The port of the NSF is 3000.

A.2.  Example 2: Registration for Capabilities of Time based Firewall

   This section shows an XML example for registering the capabilities of
   time-based firewall.

       <i2nsf-nsf-registrations
         xmlns="urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface"
         xmlns:capa="urn:ietf:params:xml:ns:yang:ietf-i2nsf-capability">

Hyun, et al.            Expires December 14, 2019              [Page 21]
Internet-Draft   Registration Interface YANG Data Model        June 2019

          <i2nsf-nsf-capability-registration>
           <nsf-name>time_based_firewall_capability</nsf-name>
           <nsf-capability-info>
             <i2nsf-capability>
               <time-capabilities>absolute-time</time-capabilities>
               <time-capabilities>periodic-time</time-capabilities>
               <condition-capabilities>
               <generic-nsf-capabilities>
                 <ipv4-capa>capa:ipv4-protocol</ipv4-capa>
                 <ipv4-capa>capa:exact-ipv4-address</ipv4-capa>
                 <ipv4-capa>capa:range-ipv4-address</ipv4-capa>
               </generic-nsf-capabilities>
             </condition-capabilities>
             <action-capabilities>
               <ingress-action-capa>capa:pass</ingress-action-capa>
               <ingress-action-capa>capa:drop</ingress-action-capa>
               <ingress-action-capa>capa:alert</ingress-action-capa>
               <egress-action-capa>capa:pass</egress-action-capa>
               <egress-action-capa>capa:drop</egress-action-capa>
               <egress-action-capa>capa:alert</egress-action-capa>
             </action-capabilities>
             <ipsec-method>capa:ike</ipsec-method>
           </i2nsf-capability>
           <nsf-performance-capability>
             <processing>
               <processing-average>1000</processing-average>
               <processing-peak>5000</processing-peak>
             </processing>
             <bandwidth>
               <outbound>
                 <outbound-average>1000</outbound-average>
                 <outbound-peak>5000</outbound-peak>
               </outbound>
               <inbound>
                 <inbound-average>1000</inbound-average>
                 <inbound-peak>5000</inbound-peak>
               </inbound>
             </bandwidth>
           </nsf-performance-capability>
         </nsf-capability-info>
         <nsf-access-info>
           <nsf-instance-name>time_based_firewall</nsf-instance-name>
           <nsf-address>221.159.112.110</nsf-address>
           <nsf-port-address>3000</nsf-port-address>
         </nsf-access-info>
       </i2nsf-nsf-capability-registration>
     </i2nsf-nsf-registrations>

Hyun, et al.            Expires December 14, 2019              [Page 22]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   Figure 13: Configuration XML for Registration of Time based Firewall

   Figure 13 shows the configuration XML for registering the time-based
   firewall and its capabilities as follows.

   1.  The instance name of the NSF is time_based_firewall.

   2.  The NSF can enforce the security policy rule according to
       absolute time and periodic time.

   3.  The NSF can inspect protocol, exact IPv4 address, and range IPv4
       address for IPv4 packets.

   4.  The NSF can determine whether the packets are allowed to pass,
       drop, or alert.

   5.  The NSF can support IPsec through IKEv2.

   6.  The NSF can have processing power and bandwidth.

   7.  The location of the NSF is 221.159.112.110.

   8.  The port of the NSF is 3000.

A.3.  Example 3: Registration for Capabilities of Web Filter

   This section shows an XML example for registering the capabilities of
   web filter.

       <i2nsf-nsf-registrations
         xmlns="urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface"
         xmlns:capa="urn:ietf:params:xml:ns:yang:ietf-i2nsf-capability">
         <i2nsf-nsf-capability-registration>
           <nsf-name>web_filter_capability</nsf-name>
           <nsf-capability-info>
             <i2nsf-capability>
               <condition-capabilities>
                 <advanced-nsf-capabilities>
                   <url-capa>capa:user-defined</url-capa>
                 </advanced-nsf-capabilities>
               </condition-capabilities>
               <action-capabilities>
                 <ingress-action-capa>capa:pass</ingress-action-capa>
                 <ingress-action-capa>capa:drop</ingress-action-capa>
                 <ingress-action-capa>capa:alert</ingress-action-capa>
                 <egress-action-capa>capa:pass</egress-action-capa>
                 <egress-action-capa>capa:drop</egress-action-capa>
                 <egress-action-capa>capa:alert</egress-action-capa>

Hyun, et al.            Expires December 14, 2019              [Page 23]
Internet-Draft   Registration Interface YANG Data Model        June 2019

               </action-capabilities>
               <ipsec-method>capa:ikeless</ipsec-method>
           </i2nsf-capability>
           <nsf-performance-capability>
             <processing>
               <processing-average>1000</processing-average>
               <processing-peak>5000</processing-peak>
             </processing>
             <bandwidth>
               <outbound>
                 <outbound-average>1000</outbound-average>
                 <outbound-peak>5000</outbound-peak>
               </outbound>
               <inbound>
                 <inbound-average>1000</inbound-average>
                 <inbound-peak>5000</inbound-peak>
               </inbound>
             </bandwidth>
           </nsf-performance-capability>
         </nsf-capability-info>
         <nsf-access-info>
           <nsf-instance-name>web_filter</nsf-instance-name>
           <nsf-address>221.159.112.120</nsf-address>
           <nsf-port-address>3000</nsf-port-address>
         </nsf-access-info>
       </i2nsf-nsf-capability-registration>
     </i2nsf-nsf-registrations>

        Figure 14: Configuration XML for Registration of Web Filter

   Figure 14 shows the configuration XML for registering the web filter,
   and its capabilities are as follows.

   1.  The instance name of the NSF is web_filter.

   2.  The NSF can inspect url for http and https packets.

   3.  The NSF can determine whether the packets are allowed to pass,
       drop, or alert.

   4.  The NSF can support IPsec not through IKEv2, but through a
       Security Controller.

   5.  The NSF can have processing power and bandwidth.

   6.  The location of the NSF is 221.159.112.120.

Hyun, et al.            Expires December 14, 2019              [Page 24]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   7.  The port of the NSF is 3000.

A.4.  Example 4: Registration for Capabilities of VoIP/VoLTE Filter

   This section shows an XML example for registering the capabilities of
   VoIP/VoLTE filter.

      <i2nsf-nsf-registrations
        xmlns="urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface"
          xmlns:capa="urn:ietf:params:xml:ns:yang:ietf-i2nsf-capability">
        <i2nsf-nsf-capability-registration>
          <nsf-name>voip_volte_filter_capability</nsf-name>
          <nsf-capability-info>
            <i2nsf-capability>
              <condition-capabilities>
                <advanced-nsf-capabilities>
                  <voip-volte-capa>capa:voice-id</voip-volte-capa>
                </advanced-nsf-capabilities>
              </condition-capabilities>
              <action-capabilities>
                <ingress-action-capa>capa:pass</ingress-action-capa>
                <ingress-action-capa>capa:drop</ingress-action-capa>
                <ingress-action-capa>capa:alert</ingress-action-capa>
                <egress-action-capa>capa:pass</egress-action-capa>
                <egress-action-capa>capa:drop</egress-action-capa>
                <egress-action-capa>capa:alert</egress-action-capa>
              </action-capabilities>
              <ipsec-method>capa:ikeless</ipsec-method>
            </i2nsf-capability>
            <nsf-performance-capability>
            <processing>
              <processing-average>1000</processing-average>
              <processing-peak>5000</processing-peak>
            </processing>
            <bandwidth>
              <outbound>
                <outbound-average>1000</outbound-average>
                <outbound-peak>5000</outbound-peak>
              </outbound>
              <inbound>
                <inbound-average>1000</inbound-average>
                <inbound-peak>5000</inbound-peak>
              </inbound>
            </bandwidth>
          </nsf-performance-capability>
        </nsf-capability-info>
        <nsf-access-info>
          <nsf-instance-name>voip_volte_filter</nsf-instance-name>

Hyun, et al.            Expires December 14, 2019              [Page 25]
Internet-Draft   Registration Interface YANG Data Model        June 2019

          <nsf-address>221.159.112.130</nsf-address>
          <nsf-port-address>3000</nsf-port-address>
        </nsf-access-info>
      </i2nsf-nsf-capability-registration>
    </i2nsf-nsf-registrations>

    Figure 15: Configuration XML for Registration of VoIP/VoLTE Filter

   Figure 15 shows the configuration XML for registering VoIP/VoLTE
   filter, and its capabilities are as follows.

   1.  The instance name of the NSF is voip_volte_filter.

   2.  The NSF can inspect voice id for VoIP/VoLTE packets.

   3.  The NSF can determine whether the packets are allowed to pass,
       drop, or alert.

   4.  The NSF can support IPsec not through IKEv2, but through a
       Security Controller.

   5.  The NSF can have processing power and bandwidth.

   6.  The location of the NSF is 221.159.112.130.

   7.  The port of the NSF is 3000.

A.5.  Example 5: Registration for Capabilities of HTTP and HTTPS Flood
      Mitigation

   This section shows an XML example for registering the capabilities of
   http and https flood mitigation.

      <i2nsf-nsf-registrations
        xmlns="urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface"
          xmlns:capa="urn:ietf:params:xml:ns:yang:ietf-i2nsf-capability">
        <i2nsf-nsf-capability-registration>
          <nsf-name>
            http_and_h ttps_flood_mitigation_capability
          </nsf-name>
           <nsf-capability-info>
            <i2nsf-capability>
               <condition-capabilities>
                 <advanced-nsf-capabilities>
                   <antiddos-capa>capa:http-flood-action</antiddos-capa>
                   <antiddos-capa>capa:https-flood-action</antiddos-capa>
                  </advanced-nsf-capabilities>

Hyun, et al.            Expires December 14, 2019              [Page 26]
Internet-Draft   Registration Interface YANG Data Model        June 2019

                </condition-capabilities>
                <action-capabilities>
                  <ingress-action-capa>capa:pass</ingress-action-capa>
                  <ingress-action-capa>capa:drop</ingress-action-capa>
                  <ingress-action-capa>capa:alert</ingress-action-capa>
                  <egress-action-capa>capa:pass</egress-action-capa>
                  <egress-action-capa>capa:drop</egress-action-capa>
                  <egress-action-capa>capa:alert</egress-action-capa>
                </action-capabilities>
                <ipsec-method>capa:ike</ipsec-method>
           </i2nsf-capability>
          <nsf-performance-capability>
            <processing>
              <processing-average>1000</processing-average>
              <processing-peak>5000</processing-peak>
            </processing>
            <bandwidth>
              <outbound>
                <outbound-average>1000</outbound-average>
                <outbound-peak>5000</outbound-peak>
              </outbound>
              <inbound>
                <inbound-average>1000</inbound-average>
                <inbound-peak>5000</inbound-peak>
              </inbound>
            </bandwidth>
          </nsf-performance-capability>
        </nsf-capability-info>
        <nsf-access-info>
          <nsf-instance-name>
            http_and_https_flood_mitigation
          </nsf-instance-name>
          <nsf-address>221.159.112.140</nsf-address>
          <nsf-port-address>3000</nsf-port-address>
        </nsf-access-info>
      </i2nsf-nsf-capability-registration>
    </i2nsf-nsf-registrations>

    Figure 16: Configuration XML for Registration of of HTTP and HTTPS
                             Flood Mitigation

   Figure 16 shows the configuration XML for registering the http and
   https flood mitigator, and its capabilities are as follows.

   1.  The instance name of the NSF is http_and_https_flood_mitigation.

Hyun, et al.            Expires December 14, 2019              [Page 27]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   2.  The NSF can control the amount of packets for http and https
       packets.

   3.  The NSF can determine whether the packets are allowed to pass,
       drop, or alert.

   4.  The NSF can support IPsec through IKEv2.

   5.  The NSF can have processing power and bandwidth.

   6.  The location of the NSF is 221.159.112.140.

   7.  The port of the NSF is 3000.

A.6.  Example 6: Query for Capabilities of Time based Firewall

   This section shows an XML example for querying the capabilities of
   time-based firewall.

Hyun, et al.            Expires December 14, 2019              [Page 28]
Internet-Draft   Registration Interface YANG Data Model        June 2019

    <rpc message-id="101"
      xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
      <i2nsf-nsf-capability-query
        xmlns="urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface"
          xmlns:capa="urn:ietf:params:xml:ns:yang:ietf-i2nsf-capability">
         <query-i2nsf-capability-info>
            <time-capabilities>absolute-time</time-capabilities>
            <time-capabilities>periodic-time</time-capabilities>
            <condition-capabilities>
              <generic-nsf-capabilities>
                <ipv4-capa>capa:ipv4-protocol</ipv4-capa>
                <ipv4-capa>capa:exact-ipv4-address</ipv4-capa>
                <ipv4-capa>capa:range-ipv4-address</ipv4-capa>
              </generic-nsf-capabilities>
            </condition-capabilities>
            <action-capabilities>
              <ingress-action-capa>capa:pass</ingress-action-capa>
              <ingress-action-capa>capa:drop</ingress-action-capa>
              <ingress-action-capa>capa:alert</ingress-action-capa>
              <egress-action-capa>capa:pass</egress-action-capa>
              <egress-action-capa>capa:drop</egress-action-capa>
              <egress-action-capa>capa:alert</egress-action-capa>
            </action-capabilities>
            <ipsec-method>capa:ikeless</ipsec-method>
         </query-i2nsf-capability-info>
      </i2nsf-nsf-capability-query>
    </rpc>

    <rpc-reply message-id="101"
      xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
      <nsf-access-info
        xmlns="urn:ietf:params:xml:ns:yang:ietf-i2nsf-reg-interface">
        <nsf-instance-name>time-based-firewall</nsf-instance-name>
        <nsf-address>221.159.223.250</nsf-address>
        <nsf-port-address>8080</nsf-port-address>
      </nsf-access-info>
    </rpc-reply>

       Figure 17: Configuration XML for Query of Time-based Firewall

   Figure 17 shows the XML configuration for querying the capabilities
   of the time-based firewall.

Hyun, et al.            Expires December 14, 2019              [Page 29]
Internet-Draft   Registration Interface YANG Data Model        June 2019

Appendix B.  NSF Lifecycle Managmenet in NFV Environments

   Network Functions Virtualization (NFV) can be used to implement I2NSF
   framework.  In NFV environments, NSFs are deployed as virtual network
   functions (VNFs).  Security Controller can be implemented as an
   Element Management (EM) of the NFV architecture, and is connected
   with the VNF Manager (VNFM) via the Ve-Vnfm interface
   [nfv-framework].  Security Controller can use this interface for the
   purpose of the lifecycle management of NSFs.  If some NSFs need to be
   instantiated to enforce security policies in the I2NSF framework,
   Security Controller could request the VNFM to instantiate them
   through the Ve-Vnfm interface.  Or if an NSF, running as a VNF, is
   not used by any traffic flows for a time period, Security Controller
   may request deinstantiating it through the interface for efficient
   resource utilization.

Appendix C.  Changes from draft-ietf-i2nsf-registration-interface-dm-03

   The following changes have been made from draft-ietf-i2nsf-
   registration-interface-dm-03:

   o  In Section 5.1.1, Figure 3 and sentences are revised to be
      synchronized with the I2NSF Capability YANG Data Model, including
      IPsec method support.

Appendix D.  Acknowledgments

   This work was supported by Institute for Information & communications
   Technology Promotion (IITP) grant funded by the Korea government
   (MSIP)(No.  R-20160222-002755, Cloud based Security Intelligence
   Technology Development for the Customized Security Service
   Provisioning).

Appendix E.  Contributors

   This document is made by the group effort of I2NSF working group.
   Many people actively contributed to this document.  The following are
   considered co-authors:

   o  Jinyong Tim Kim (Sungkyunkwan University)

   o  Chaehong Chung (Sungkyunkwan University)

   o  Susan Hares (Huawei)

   o  Diego R.  Lopez (Telefonica)

Hyun, et al.            Expires December 14, 2019              [Page 30]
Internet-Draft   Registration Interface YANG Data Model        June 2019

Authors' Addresses

   Sangwon Hyun
   Department of Computer Engineering
   Chosun University
   309, Pilmun-daero, Dong-gu
   Gwangju, Jeollanam-do  61452
   Republic of Korea

   EMail: shyun@chosun.ac.kr

   Jaehoon Paul Jeong
   Department of Computer Science and Engineering
   Sungkyunkwan University
   2066 Seobu-Ro, Jangan-Gu
   Suwon, Gyeonggi-Do  16419
   Republic of Korea

   Phone: +82 31 299 4957
   Fax:   +82 31 290 7996
   EMail: pauljeong@skku.edu
   URI:   http://iotlab.skku.edu/people-jaehoon-jeong.php

   Taekyun Roh
   Department of Electronic, Electrical and Computer Engineering
   Sungkyunkwan University
   2066 Seobu-Ro, Jangan-Gu
   Suwon, Gyeonggi-Do  16419
   Republic of Korea

   Phone: +82 31 290 7222
   Fax:   +82 31 299 6673
   EMail: tkroh0198@skku.edu

   Sarang Wi
   Department of Electronic, Electrical and Computer Engineering
   Sungkyunkwan University
   2066 Seobu-Ro, Jangan-Gu
   Suwon, Gyeonggi-Do  16419
   Republic of Korea

   Phone: +82 31 290 7222
   Fax:   +82 31 299 6673
   EMail: dnl9795@skku.edu

Hyun, et al.            Expires December 14, 2019              [Page 31]
Internet-Draft   Registration Interface YANG Data Model        June 2019

   Jung-Soo Park
   Electronics and Telecommunications Research Institute
   218 Gajeong-Ro, Yuseong-Gu
   Daejeon  305-700
   Republic of Korea

   Phone: +82 42 860 6514
   EMail: pjs@etri.re.kr

Hyun, et al.            Expires December 14, 2019              [Page 32]