TIBBS, Richard W Firewalls and VPNs: principles and practices / Richard W. Tibbs, Edward B. Oakes - New Jersey Pearson Prentice hall 2005 - xxii, 442 p. Includes glossary, references, appendix and index. ISBN: 131547313 Subjects--Topical Terms: Computer-Security Dewey Class. No.: 5.8 / TIB