Hardening Linux
“Hardening” is the process of protecting a system and its applications against unknown threats. Hardening Linux identifies many of the risks of running Linux hosts and applications and provides practical examples and methods to minimize those risks. The book is written for Linux/UNIX administrators who do not necessarily have in-depth knowledge of security but need to know how to secure their networks.
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Hardening" is the process of protecting a system and its applications against unknown threats. Hardening Linux identifies many of the risks of running Linux hosts and applications and provides practical examples and methods to minimize those risks. The book is written for Linux/UNIX administrators who do not necessarily have in-depth knowledge of security but need to know how to secure their networks. In this book, you'll learn how to secure: The base operating system and firewall with iptables Connections to your hosts Fie systems and files Email servers IMAP and POP servers FTP servers A quick reference of the procedures discussed in each chapter are summarized in Appendix C.
Ch. 1Hardening the basics1Ch. 2Firewalling your hosts79Ch. 3Securing connections and remote administration137Ch. 4Securing files and file systems187Ch. 5Understanding logging and log monitoring233Ch. 6Using tools for security testing281Ch. 7Securing your mail server321Ch. 8Authenticating and securing your mail373Ch. 9Hardening remote access to e-mail403Ch. 10Securing an FTP server443Ch. 11Hardening DNS and BIND463App. AThe bastion host firewall script511App. BBIND configuration files517App. CCheckpoints525
