Intended for Linux administrators, this guide shows how to protect Linux hosts, the base Linux operating system, and some of the common applications run on Linux hosts. Turnball, who is a security consultant for the Commonwealth Bank of Australia, identifies the risks associated with running Linux and provides configurations and examples for securing firewalls, connections, file systems, e-mail servers, remote access to e-mail, FTP servers, and DNS services. Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)