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Title : Port Randomization
Author(s) : M. Larsen, F. Gont
Filename : draft-larsen-tsvwg-port-randomization-01.txt
Pages : 20
Date : 2007-2-13
Recently, awareness has been raised about a number of "blind" attacks
that can be performed against the Transmission Control Protocol (TCP)
and similar protocols. The consequences of these attacks range from
throughput-reduction to broken connections or data corruption. These
attacks rely on the attacker's ability to guess or know the four-
tuple (Source Address, Destination Address, Source port, Destination
Port) that identifies the transport protocol instance to be attacked.
This document describes a simple and efficient method for random
selection of the client port number, such that the possibility of an
attacker guessing the exact value is reduced. While this is not a
replacement for cryptographic methods, the described port number
randomization algorithms provide improved security/obfuscation with
very little effort and without any key management overhead.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-larsen-tsvwg-port-randomization-01.txt
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