A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : An Authentication-only Profile for ESP with an IP Protocol Identifier
Author(s) : P. Hoffman, D. McGrew
Filename : draft-hoffman-esp-null-protocol-00.txt
Pages : 7
Date : 2007-08-24
It is desirable to allow firewalls and intrusion detection systems to
be able to inspect the payload of an ESP packet that has been
encrypted with the NULL cipher. This would allow a firewall to read
the contents and apply the normal policies to it. However, a device
in the network cannot reliably determine which ESP packets are NULL
encrypted, and cannot easily determine other ESP format parameters
such as the ICV length. These issues can cause misclassification of
packets and wasted computational resources.
This document solves this problem by defining an authentication-only
profile of ESP and reserving IP protocol numbers for it.
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http://www.ietf.org/internet-drafts/draft-hoffman-esp-null-protocol-00.txt
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