This cheat sheet provides advanced, practical techniques to strengthen container security beyond basic controls. It covers key practices such as rotating secrets frequently, securing service-to-service communication with mTLS and service meshes, and implementing runtime monitoring using eBPF tools like Tetragon. It also highlights intrusion detection, zero-trust architectures, automated policy enforcement with OPA, admission controllers, and image signing. The guide includes environment-specific recommendations for Kubernetes, Docker, and cloud services. The key takeaway is that proactive, automated, and layered security practices are essential to defend against modern container threats and ensure resilient cloud-native applications.

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