Bob Ziegler, a renowned firewall architect, has honed his skills by working for companies such as Nokia by collaborating with several of their router and access groups in Massachusetts, Californie, and Finland. Prior to that, he worked as a UNIX operating system developer for various research and development companies. Bob is well known for authoring New Riders' very successful Linux Firewolls and for his recent presentation at the SANS conference in Baltimore. In his spore time, he maintains his web site, www.linux-firewall-tools.com/linux.