Mission Critical Internet Security explore your options to protect your network from attacks on the Internet, emphasizing firewall solutions from Cisco, Symantec, Microsoft, and Check Point. You'll also appreciate the question-and-answer section that explains considered many alternative designs (SOCKS proxy vs. Winsock proxy, for example) and engineering challenges (one example: build IPsec virtual private network between the firewalls from different manufacturers). Product-specific part of the Microsoft Proxy Server, Cisco PIX, Symantec Raptor, and Check Point FireWall-1 includes a lot of detail, and Syngress promised to continue with the upgrade manufacturers (through web updates for this book) at least a year. Particularly detailed coverage go to IPsec, Kerberos, Cisco PIX, Symantec (formerly Axent) Raptor, Microsoft Proxy Server, and Check Point FireWall-1.