A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Security Maintenance and Extensions Working 
Group of the IETF.


        Title           : Heuristics for Detecting ESP-NULL packets
        Author(s)       : T. Kivinen, D. McDonald
        Filename        : draft-ietf-ipsecme-esp-null-heuristics-01.txt
        Pages           : 33
        Date            : 2009-09-03

This document describes a heuristic approach for distinguishing ESP-
NULL (Encapsulating Security Payload without encryption) packets from
encrypted ESP packets.  The reason for using heuristics instead of
modifying ESP is to provide a solution that can be used now without
updating all end nodes.  With heuristic methods, only the
intermediate devices wanting to find ESP-NULL packets need to be
updated.

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