Firewalls

John Vacca is an independent information technology consultant and researcher, professional writer, editor, reviewer, and author based in Pomeroy, Ohio, USA. Since 1982, John has authored, edited, and published more than 85 books, including Smart Cities Policies and Financing: Approaches and Solutions, Elsevier; Cloud Computing Security: Foundations and Challenges, Taylor and Francis/CRC Press; Solving Urban Infrastructure Problems Using Smart City Technologies: Handbook on Planning, Design, Development, and Regulation, Elsevier; Online Terrorist Propaganda, Recruitment, and Radicalization, Taylor and Francis/CRC Press; Nanoscale Networking and Communications Handbook, Taylor and Francis/CRC Press; Handbook of Sensor Networking: Advanced Technologies and Applications, Taylor and Francis/CRC Press; Network and System Security 2/e, Elsevier/Syngress; Cyber Security and IT Infrastructure Protection, Elsevier/Syngress; and Managing Information Security 2/e, Elsevier/Syngress; among many others. John was a Configuration Management Specialist, Computer Specialist, and the Computer Security Official (CSO) for NASA's space station program (Freedom) and the International Space Station Program from 1988 until his retirement from NASA in 1995. John has also been a security consultant for major motion pictures, including AntiTrust, Collateral, and Identity Theft: The Michelle Brown Story. He received his M.Sc. from Kansas State University and an MBA from Emporia State University and served in the United States Air Force from 1967-1971.Scott Ellis is an independent consultant based in Chicago.