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Robert Ziegler is a router security architect who until recently worked for Nokia, designing firewall products for Nokia's future product families. In his spare time Bob offers free web-based firewall design services for the home user, as well as a popular LAN and Firewall FAQ to help people quickly get their Linux systems set up securely. He has worked as a UNIX operating system developer for various research and development companies. Bob wrote the very successful first edition of this book, Linux Firewalls, ISBN: 0-7357-0900-9.