Segregation is one of those strategies that, when used well, can improve your security posture much more than any shinny expensive security solution. It is a key security concept. It is one of the main strategies that we can embrace to obtain real security, however, very frequently we don’t consider it. We apply segregation when we separate the asset from the threat. We implement segregation, for example, when we put a firewall between two networks. This is the most clear example, but we also apply segregation in many other situations: when we use containers; when we use virtual machines; when we close open ports; when we use different roles with different authorization levels; etc.

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