FedRAMP High Baseline demands strict control. In Kubernetes, that control starts with network policies. Without them, traffic flows anywhere. With them, you lock the path. Every namespace, every pod, every port—only what’s allowed moves.
A FedRAMP High Baseline Kubernetes Network Policy defines where data can travel. It is more than best practice. It is a requirement. It enforces least privilege between services. It isolates sensitive workloads. It prevents unauthorized ingress and egress.
To meet FedRAMP High, use policies that default to deny all traffic. Then open only what is needed. This means:
- Apply
NetworkPolicyobjects for every namespace containing regulated data. - Match pods with clear, consistent labels.
- Set explicit
ingressrules for known sources. - Set explicit
egressrules for known destinations. - Block all cross-namespace traffic unless authorized.
- Restrict outbound calls to approved IPs or CIDRs.
Testing matters. Review policies in YAML, but also verify in live clusters. Simulate unwanted traffic and confirm it fails. Audit logs often. Changes should be rare and documented. Every exception is high risk under FedRAMP High.