RFC 5879 · INFORMATIONAL · 2010

Heuristics for Detecting ESP-NULL Packets

Overview

RFC 5879, “Heuristics for Detecting ESP-NULL Packets”, is an Informational document published in May 2010 by T. Kivinen, D. McDonald. The canonical text is published by the RFC Editor.

Abstract

This document describes a set of heuristics for distinguishing IPsec ESP-NULL (Encapsulating Security Payload without encryption) packets from encrypted ESP packets. These heuristics can be used on intermediate devices, like traffic analyzers, and deep-inspection engines, to quickly decide whether or not a given packet flow is encrypted, i.e., whether or not it can be inspected. Use of these heuristics does not require any changes made on existing IPsec hosts that are compliant with RFC 4303. This document is not an Internet Standards Track specification; it is published for informational purposes.

Abstract as published in the RFC, via rfc-editor.org.

What “Informational” means

Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.

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