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managing-network-policies

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Execute use when managing Kubernetes network policies and firewall rules. Trigger with phrases like "create network policy", "configure firewall rules", "restrict pod communication", or "setup ingress/egress rules". Generates Kubernetes NetworkPolicy manifests following least privilege and zero-trust principles.

skills/.curated/managing-network-policies/SKILL.md

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Nov 12, 2026
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# Managing Network Policies

## Overview

Create and manage Kubernetes NetworkPolicy manifests to enforce zero-trust networking between pods, namespaces, and external endpoints. Generate ingress and egress rules with label selectors, namespace selectors, CIDR blocks, and port specifications following the principle of least privilege.

## Prerequisites

- Kubernetes cluster with a CNI plugin that supports NetworkPolicy (Calico, Cilium, Weave Net)
- `kubectl` configured with permissions to create and manage NetworkPolicy resources
- Pod labels consistently defined across deployments for accurate selector targeting
- Service communication map documenting which pods need to talk to which pods on which ports
- Understanding of DNS requirements (pods need egress to kube-dns on port 53 for name resolution)

## Instructions
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