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How do I configure network segmentation in Kubernetes clusters?

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How do I configure network segmentation in Kubernetes clusters?

Asked on Oct 15, 2025

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Network segmentation in Kubernetes clusters can be achieved using network policies, which allow you to control the communication between pods and services. This approach enhances security by limiting access based on defined rules.

Example Concept: Kubernetes Network Policies are used to define how groups of pods are allowed to communicate with each other and with other network endpoints. By default, pods are non-isolated and can communicate with any other pod. Network policies enable you to specify rules that restrict traffic, effectively segmenting the network. These policies are implemented by network plugins that support the NetworkPolicy API, such as Calico, Cilium, or Weave Net.

Additional Comment:

Network policies are defined as Kubernetes resources and can be applied using YAML manifests.
Ensure your chosen CNI (Container Network Interface) plugin supports network policies.
Test network policies in a staging environment to verify they enforce the desired segmentation.
Use labels to select pods for which the network policies apply, allowing for flexible and dynamic segmentation.
Regularly review and update network policies to adapt to changes in your application architecture.

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How do I configure network segmentation in Kubernetes clusters?

Asked on Oct 15, 2025

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