# Kubernetes Network Policy and Isolation

> Master Kubernetes network isolation. Learn to implement Network Policies, enforce zero-trust pod communication, and prevent lateral movement.

Canonical: https://codelivly.com/rooms/kubernetes-network-policy-and-isolation
Last updated: 2026-09-24

| | |
|---|---|
| Level | Intermediate |
| Category | Cloud Security |
| Lessons | 3 |
| Estimated time | 30 min |
| XP | 100 |

This intermediate module dives into the critical practice of micro-segmentation within Kubernetes clusters. You will learn how Kubernetes networking operates by default (a flat, allow-all model) and how to fundamentally change that using Kubernetes Network Policies. The curriculum covers writing precise ingress and egress rules, isolating namespaces, securing pod-to-pod communication, and understanding the prerequisites for policy enforcement (such as using a supporting CNI like Calico or Cilium). By mastering these concepts, you will prevent lateral movement and build a true zero-trust network architecture for your containerized workloads.

## Lessons

1. What Is Kubernetes Network Policy and Why Does It Matter (30 min)
2. Namespace Isolation and Network Policies (30 min)
3. Guided Lab: Implementing Pod-to-Pod Network Segmentation (30 min)

## Related

- [Learning path: Container and Kubernetes Security](https://codelivly.com/learning-paths/container-and-kubernetes-security)
- [All rooms](https://codelivly.com/rooms)