Absolute OpenBSD: UNIX for the Practical Paranoid (2nd by Michael W. Lucas

By Michael W. Lucas

retail quality

The definitive advisor to OpenBSD

Foreword via Henning Brauer, OpenBSD PF Developer

OpenBSD, the based, hugely safe Unix-like working process, is conventional because the foundation for severe DNS servers, routers, firewalls, and extra. This long-awaited moment variation of Absolute OpenBSD continues writer Michael Lucas's trademark elementary and useful process that readers have loved for years. You'll research the intricacies of the platform, the technical information in the back of definite layout judgements, and most sensible practices, with bits of humor sprinkled all through. This variation has been thoroughly up-to-date for OpenBSD 5.3, together with new insurance of OpenBSD's boot approach, security measures like W^X and ProPolice, and complex networking techniques.

You'll learn the way to:
* deal with community site visitors with VLANs, trunks, IPv6, and the PF packet filter
* Make software program administration quickly and potent utilizing the ports and programs system
* provide clients in basic terms the entry they wish with teams, sudo, and chroots
* Configure OpenBSD's safe implementations of SNMP, DHCP, NTP, sensors, and more
* customise the deploy and improve approaches to your community and undefined, or construct a customized OpenBSD release

Whether you're a brand new person trying to find an entire advent to OpenBSD or an skilled sysadmin trying to find a refresher, Absolute OpenBSD, 2d Edition provides you with every thing you must grasp the intricacies of the world's safest working system.

"The definitive publication on OpenBSD will get a long-overdue refresh."

-Theo de Raadt, OpenBSD Founder

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Extra resources for Absolute OpenBSD: UNIX for the Practical Paranoid (2nd Edition)

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Chapter 18: Kernel Configuration Discusses the various tools available to configure a standard kernel. Unlike many other free Unix-like operating systems, OpenBSD does not expect or require the system administrator to compile a kernel. You can tune the standard kernels without recompiling. Chapter 19: Building Custom Kernels Discusses how to recompile a kernel in those rare instances when you must. Chapter 20: Upgrading Covers how to upgrade OpenBSD, either from a snapshot or from source. xlii Introduction Chapter 21: Packet Filtering Documents OpenBSD’s integrated packet-filtering engine, PF.

Most problems arise from their own understanding, or lack thereof. When a program behaves unexpectedly, the problem is usually a gap in your expectations or understanding, and the OpenBSD community expects 1. Yes, the first chapter in this book is about getting help outside the book. I am aware of the irony; you don’t need to tell me. 2 Chapter 1 that you will work to improve your own knowledge so that you can make the system meet your needs. Other people make OpenBSD work correctly, and you can, too.

Don’t ask about the mounds of dirt in my backyard. xxx Introduction What Is BSD? In the 1970s, AT&T needed a lot of specialized, custom-written computer software to run its business. The company was forbidden to compete in the computer industry, so it could not sell this software. Instead, AT&T licensed its software and the related source code to universities for nominal sums. Universities saved money by using this software instead of commercial equivalents with pricey licenses, and university students got access to this nifty technology and could learn how everything worked.

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