The cluster was up. Pods spun into life. Traffic moved. You had control — but not enough. Without strict Kubernetes Network Policies, your SOC 2 compliance is a liability waiting to be exposed.
Kubernetes Network Policies define how pods talk to each other and to the outside world. They let you enforce security boundaries at the network layer. SOC 2 requires control over data flow, isolation between workloads, and protection against unauthorized access. Network Policies are your tool for proving that these boundaries are real, measurable, and automated.
A Network Policy in Kubernetes uses label selectors to target pods. You define ingress and egress rules. Ingress controls who can send traffic in. Egress controls where traffic can go out. Default is open — everything talks to everything. For SOC 2, that default fails the test. You need a default deny policy, then you explicitly allow only what is necessary.
For SOC 2 audits, documentation matters as much as configuration. Each Namespace should have a clear set of Network Policies tied to the services inside. Every policy should map to a security requirement. If auditors can trace the rule to the SOC 2 criteria for confidentiality, integrity, or availability, you have leverage.