Amazon.com description: Product Description: With the explosion of Linux on both college campuses and in corporate environments, any marketable CS student will need Linux skills in his bag. In addition to guiding students through the basic steps of designing and implementing a packet-filtering firewall, Linux Firewalls discusses disabling unnecessary services, selecting services to make public, and identifying dangerous local services that need to be protected behind a firewall. Students will find information on higher-level forms of access control, common server configuration issues, and system security and integrity monitoring. They will gain skills to detect preliminary probes and unauthorized access attempts before an intrusion occurs. Ideal of both security and system administration courses.