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USENIX 2005 Annual Technical Conference, FREENIX Track — Abstract
Pp. 71–81 of the Proceedings
A Tool for Automated IPtables Firewall Analysis
Robert Marmorstein and Phil Kearns, College of William and Mary
Abstract
We describe ITVal, a tool that enables the efficient analysis of
an iptables-based firewall. The underlying basis of ITVal is a
library for the efficient manipulation of multi-way decision diagrams. We
represent iptables rule sets and queries about the firewall defined by
those rule sets as multi-way decision diagrams, and determine answers for
the queries by manipulating the diagrams. In addition to discussing the
design and implementation of ITVal, we describe how it can be used to
detect and correct common firewall errors.
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