datatracker.ietf.org
Sign in
Version 5.6.4.p1, 2014-10-20
Report a bug

Problem Statement of SAVI Beyond the First Hop
draft-bi-savi-problem-07

Document type: Active Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2014-05-19
Intended RFC status: Unknown
Other versions: plain text, pdf, html

Stream State:No stream defined
Document shepherd: No shepherd assigned

IESG State: I-D Exists
Responsible AD: (None)
Send notices to: No addresses provided

SAVI                                                               J. Bi
Internet-Draft                                                    B. Liu
Intended status: Informational                            Tsinghua Univ.
Expires: November 21, 2014                                  May 20, 2014

             Problem Statement of SAVI Beyond the First Hop
                        draft-bi-savi-problem-07

Abstract

   IETF Source Address Validation Improvements (SAVI) working group is
   chartered for source address validation within the first hop from the
   end hosts, i.e., preventing a node from spoofing the IP source
   address of another node in the same IP link.  However, since SAVI
   requires the edge routers or switches to be upgraded, the deployment
   of SAVI will need a long time.  During this transition period, some
   source address validation techniques beyond the first hop (SAVI-BF)
   may be needed to complement SAVI and protect the networks from
   spoofing based attacks.  In this document, we first propose three
   desired features of the SAVI-BF techniques.  Then we analyze the
   problems of the current SAVI-BF technique, ingress filtering.
   Finally, we discuss the directions that we can explore to improve
   SAVI-BF.

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 http://datatracker.ietf.org/drafts/current/.

   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 November 21, 2014.

Copyright Notice

   Copyright (c) 2014 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Bi & Liu                Expires November 21, 2014               [Page 1]
Internet-Draft        SAVI Problem Beyond First Hop             May 2014

   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.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Desired Features of SAVI-BF Techniques  . . . . . . . . . . .   3
     2.1.  High Deployment Incentives  . . . . . . . . . . . . . . .   3
     2.2.  Low Operational Risks . . . . . . . . . . . . . . . . . .   3
     2.3.  Low Cost  . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Problems of Ingress Filtering . . . . . . . . . . . . . . . .   4
     3.1.  IAL . . . . . . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Strict/feasible RPF . . . . . . . . . . . . . . . . . . .   6
     3.3.  Loose RPF*  . . . . . . . . . . . . . . . . . . . . . . .   6
     3.4.  Other Reasons . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Discussion  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Path based Techniques . . . . . . . . . . . . . . . . . .   7
     4.2.  End-to-end based Techniques . . . . . . . . . . . . . . .   7
     4.3.  Non-technical Proposals . . . . . . . . . . . . . . . . .   8
   5.  Acknowledgment  . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Informative References  . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

[include full document text]