Inexpensive, effective mixed-platform Network Security using Linux-based solutions. 

Horizon Network Security™
phone: +1 770-662-8321, email:

Our Publications

Our Publications

The five star guide to securing your Linux or Unix system and mixed-OS network
Book information

Foreword by Eric Raymond.
Cover quote by Steve Bourne.

Articles on Computer Security

Featured Articles in Unix Review

Monthly Column in Unix Review

Problem Solver monthly column in "Unix Review" magazine. Some of the column topics are listed below.

Technical Book Review

M680x0 Assembly Language Programming By Example, by Stan Kelley-Bootle


Assistance was provided to Stan Kelley-Bootle, who wrote the following.