The definitive book on UNIX security, this volume covers every aspect of computer security on UNIX machines and the Internet.

This handbook tells system administrators how to make their UNIX system as secure as it possibly can be, without going to trusted system technology. If you are a UNIX system administrator or user who needs to deal with security, you need this book.

Organized by tasks, this guide covers the standard UNIX commands, options, scripts, programming languages, and major variations found in UNIX and Linux systems.

A practical guide that describes system vulnerabilities and protective countermeasures, this book is the complete reference tool. Contents include UNIX and security basics, system administrator tasks, network security, and appendices containing checklists. The book also tells you how to detect intruders in your system, clean up after them, and even prosecute them.

This text focuses on the security fixes and tools used to fend off hackers. Topics include: passwords; permissions; cryptography; backups; and auditing and logging. The CD-ROM contains UNIX security programs available for security checkers IIS, SATAN and Kerberos.

OpenBSD, the elegant, highly secure Unix-like operating system, is widely used as the basis for critical DNS servers, routers, firewalls, and more. This long-awaited second edition of Absolute OpenBSD maintains author Michael Lucas's trademark straightforward and practical approach that readers have enjoyed for years. You'll learn the intricacies of the platform, the technical details behind certain design decisions, and best practices, with bits of humor sprinkled throughout. This edition has been completely updated for OpenBSD 5.3, including new coverage of OpenBSD's boot system, security features like W^X and ProPolice, and advanced networking techniques. You'll learn how to: –Manage network traffic with VLANs, trunks, IPv6, and the PF packet filter –Make software management quick and effective using the ports and packages system –Give users only the access they need with groups, sudo, and chroots –Configure OpenBSD's secure implementations of SNMP, DHCP, NTP, hardware sensors, and more –Customize the installation and upgrade processes for your network and hardware, or build a custom OpenBSD release Whether you're a new user looking for a complete introduction to OpenBSD or an experienced sysadmin looking for a refresher, Absolute OpenBSD, 2nd Edition will give you everything you need to master the intricacies of the world's most secure operating system.