Kubernetes network policies are essential for controlling how traffic flows between pods, namespaces, and external endpoints in your cluster, helping you enforce security and compliance requirements. This guide by Scott Rigby explains the differences between Layer 4 (L4) and Layer 7 (L7) policies, their pros and cons, and how combining both approaches—using tools like Linkerd—can help you achieve a robust, zero-trust security model tailored to modern cloud-native environments.

https://www.buoyant.io/blog/a-guide-to-modern-kubernetes-network-policies