Novel Design and Implementation of Cross-Domain Privacy-Preserving Firewall Optimization

Firewalls are very important in Internet for providing security and privacy. Firewalls checks each incoming and outgoing packets based on its rules set in their policies. As per the vast requirement of services on internet the rule set in firewall policies becomes large, so the increasing number of rules in a firewall policy reduces its throughput. So, optimizing the firewalls is very important for improving the throughput as well as network performance. In this paper we propose a novel privacy preserving protocol that removes the redundant rules present in two adjacent firewalls that belong to two different administrative domains, and reorder those rules, in a privacy preserving way. We implemented our protocol and conducted experiments. As the result our protocol effectively removed the redundant rules and enormously improved the network performance. Keywords— Cooperative Firewall, Privacy Preservation, Cross domain, Firewall optimization