James Turnbull is an experienced technology and business leader with a focus on building organizations, infrastructure, applications and security. He's the author of six technical books including Hardening Linux, which
focuses on hardening Linux hosts including the base operating system, file systems, firewalling,
connections, logging, testing your security and securing a number of common applications including
e-mail, FTP and DNS. He is also the author of Pro Nagios 2.0, which focuses on enterprise
management using the Nagios open source tool.