As the security challenges facing Linux
system and network administrators have grown, the security tools and
techniques available to them have improved dramatically. In Linux® Firewalls, Fourth Edition,
long-time Linux security expert Steve Suehring has revamped his
definitive Linux firewall guide to cover the important advances in Linux
security.

An
indispensable working resource for every Linux administrator concerned
with security, this guide presents comprehensive coverage of both
iptables and nftables. Building on the solid networking and firewalling
foundation in previous editions, it also adds coverage of modern tools
and techniques for detecting exploits and intrusions, and much more.

Distribution
neutral throughout, this edition is fully updated for today’s Linux
kernels, and includes current code examples and support scripts for Red
Hat/Fedora, Ubuntu, and Debian implementations. If you’re a Linux
professional, it will help you establish an understanding of security
for any Linux system, and for networks of all sizes, from home to
enterprise.

Inside, you’ll find just what you need to

• Install, configure, and update a Linux firewall running either iptables or nftables
• Migrate to nftables, or take advantage of the latest iptables enhancements
• Manage complex multiple firewall configurations
• Create, debug, and optimize firewall rules
• Use Samhain and other tools to protect filesystem integrity, monitor networks, and detect intrusions
• Harden systems against port scanning and other attacks
• Uncover exploits such as rootkits and backdoors with chkrootkit