[OPSEC] I-D Action: draft-ietf-opsec-urpf-improvements-02.txt

internet-drafts@ietf.org Thu, 04 April 2019 13:06 UTC

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Subject: [OPSEC] I-D Action: draft-ietf-opsec-urpf-improvements-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Operational Security Capabilities for IP Network Infrastructure WG of the IETF.

        Title           : Enhanced Feasible-Path Unicast Reverse Path Filtering
        Authors         : Kotikalapudi Sriram
                          Doug Montgomery
                          Jeffrey Haas
	Filename        : draft-ietf-opsec-urpf-improvements-02.txt
	Pages           : 16
	Date            : 2019-04-04

   This document identifies a need for improvement of the unicast
   Reverse Path Filtering techniques (uRPF) [BCP84] for source address
   validation (SAV) [BCP38].  The strict uRPF is inflexible about
   directionality, the loose uRPF is oblivious to directionality, and
   the current feasible-path uRPF attempts to strike a balance between
   the two [BCP84].  However, as shown in this draft, the existing
   feasible-path uRPF still has shortcomings.  This document describes
   an enhanced feasible-path uRPF technique, which aims to be more
   flexible (in a meaningful way) about directionality than the
   feasible-path uRPF.  It can potentially alleviate ISPs' concerns
   about the possibility of disrupting service for their customers, and
   encourage greater deployment of uRPF techniques.

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