The "New Linux” as it is sometimes called, Kubernetes relies on the same "old" information security controls we are used to. But it also brings the fresh ones! This technical talk aims to get you familiar with one of them – Admission Control. Beginning with the overview and the reason to use, going further providing non-obvious use cases accompanied with practical tips and tricks, we arise a provocative question – is this the most importnat control you should pay attention to when hardening your clusters?