Utilizing Static Packet Filters to Enhance Network Security

Many network installations today consist of a firewall to provide security between the increasing hostile environment of the Internet and the corporate network. This paper examines utilizing Access Control Lists to implement static packet filters at a network perimeter to enhance security in any sized network. An examination of NSA recommended filters will be performed, potential weaknesses discussed, enhancements conceived, and the effects of these filters upon the devices they are placed. Additional ideas will include enhancements to Cisco routers that are available to provide further security.