Policy anomaly reporting for distributed firewalls

Abstract

Firewall is a protective device which is installed between two networks.Firewall functionality depends on the filtering rules and their order. All rule relations must be considered in order to determine correct rule order. In this thesis, anomaly discovery algorithms are implemented for single and distributed firewall environments in a software tool called .Policy Anomaly Checker.. A number of tests are performed using different policies and network topologies in order to obtain operational values of these algorithms.