Heuristics for Detecting ESP-NULL packets

Document Type Replaced Internet-Draft (individual)
Authors Tero Kivinen  , Daniel McDonald 
Last updated 2009-05-26 (latest revision 2009-01-22)
Replaced by RFC 5879
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IESG IESG state Replaced by draft-ietf-ipsecme-esp-null-heuristics
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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.


Tero Kivinen (kivinen@safenet-inc.com)
Daniel McDonald (danmcd@sun.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)