Lock Down Inter-Pod Communication with NetworkPolicies

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Security

Lock Down Inter-Pod Communication with NetworkPolicies

NetworkPolicies are a great way to control network communication within a Kubernetes cluster. In this lab, you will make a Kubernetes cluster more secure by using NetworkPolicies to restrict network traffic to only traffic that is actually needed by applications running in the cluster.

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Lab Info

Level

Advanced

Last updated

Sep 23, 2025

Duration

30m

Challenge

Block Incoming Traffic by Default for All Pods in the web-auth Namespace

Create a configuration that causes incoming traffic to all Pods in the web-auth namespace to be blocked by default.
Challenge

Allow Traffic from the auth-client Pod to Reach the web-auth-server
Allow the auth-client Pod to reach web-auth-server. Both Pods are in the web-auth namespace. You can use existing labels to accomplish this.
- auth-client needs to be able to reach web-auth-server on port 80.
- Only Pods with the appropriate label should be able to access web-auth-server, even if they are in the web-auth namespace.
- Pods outside the web-auth namespace should never be able to access web-auth-server, no matter what labels they have.

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