This guide was compiled by a team of talented people who work with securing Linux on a daily basis. The information contained within this guide represents a thorough and accurate step-by-step approach to securing Linux. Many technical reviews were done to ensure that, when put into practice, the ideas and examples in this Guide work according to the text. As with any *inx variant OS, there are several ways to accomplish the same task. This guide concentrates on Red Hat 7.3 because it was the most widely used version while this information was being compiled and will be for some time until Red Hat 8.0 is better established. Remember that this is a guide and should be used as such. Not everything included is for every system. A conscious effort was made to explain the "why" behind all the recommendations in this guide, and hope that every reader gains a little more knowledge about securing a Linux system.
Comments that offer more efficient ways of dealing with issues discussed in this Guide are welcome. Please feel free to send comments to
linux-sbs@sans.org, in care of Mitch Baker, for possible inclusion in versions published at a later date.