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Enforce Kubernetes network segmentation using Calico CNI network policies and global network policies to control pod-to-pod traffic, restrict egress, and implement zero-trust microsegmentation.
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| name | implementing-container-network-policies-with-calico |
| description | Enforce Kubernetes network segmentation using Calico CNI network policies and global network policies to control pod-to-pod traffic, restrict egress, and implement zero-trust microsegmentation. |
| domain | cybersecurity |
| subdomain | container-security |
| tags | ["container-security","kubernetes","calico","network-policy","microsegmentation","cni"] |
| version | 1.0 |
| author | mahipal |
| license | Apache-2.0 |
| nist_csf | ["PR.PS-01","PR.IR-01","ID.AM-08","DE.CM-01"] |
| mitre_attack | ["T1610","T1611","T1609","T1525"] |
Calico provides Kubernetes-native and extended network policy enforcement through its CNI plugin. This skill covers creating and auditing Calico NetworkPolicy and GlobalNetworkPolicy resources to implement pod-to-pod traffic control, namespace isolation, egress restrictions, and DNS-based policy rules using calicoctl and the Kubernetes API.
kubernetes client libraryUse calicoctl and kubectl to inventory current network policies and identify unprotected namespaces.
Create default-deny ingress and egress policies per namespace as a zero-trust baseline.
Define granular allow rules for legitimate pod-to-pod and pod-to-service communication.
Test connectivity between pods to verify policies are correctly enforced.
JSON audit report listing all network policies, unprotected namespaces, policy rule counts, and connectivity test results.