Securing the perimeter in order to protect assets can be a very broad topic. In this chapter, the focus will be on IT perimeter security. There are a few different approaches to IT perimeter security but, at its core, the goal of IT perimeter security is having security controls in place against known and unknown threats while taking risk-based decisions.
"One of the main cyber risks is to think they don't exist. The other is to try to treat all potential risks."
– Stephane Nappo
A successful IT perimeter security plan will prove whether your security architecture, technologies in use, and established processes are able to prevent cyber attacks and, when they still occur, how fast you can detect and respond to them. Historically, many organizations rely on a single trust network model. In that model, organizations...
