Research on Power Border Firewall Policy Import and Optimization Tool.

At present, the security strategy of the lower boundary protection equipment of the power system can no longer meet the needs of the current business growth. A large number of redundant strategies cause the protection performance of the boundary firewall to decline. At the same time, the large number of business growth causes the network boundary order of the power grid system to be blurred. In order to prevent the paralysis and partial collapse of the network and ensure the reliability and integrity of the power business data and enterprise information, this paper develops a smart border firewall optimization tool. This tool can not only integrate the security device policies of different manufacturers through Simple Policy Specification Description Language (SPSDL), but also prioritize security rules according to the frequency of use through keyword filtering algorithms and rule optimization decision trees, then realize the classification, streamlining, optimization and upgrading of firewall security rules. The research results show that the power system firewall can achieve an accuracy rate of more than 90% when the strategy is imported. The rule optimization part can reduce the unique correlation addition index of this paper to about 0.2, which solves the problem of firewall security strategy import language diversification. It further eases the pressure of firewall policy redundancy under the power system.