In this chapter we will look carefully at securing our box. Security is one of the most important topics when talking about publicly available systems and one of the largest reasons for the existence of botnets and spam. It is therefor of great importance that we do everything to secure our machine and make hackers dreams nightmares.
Please note that this guide tries to follow best practices and wants you to leave with an absolutely secure machine - but this is simply not possible. Each service you run, each port you open and each package you install might need its own security tweaks, so make sure to study carefully the potential doors your actions could open.