Enforce a NetworkPolicy to Block All Traffic Except DNS
by Omkar Shelke
A Pod must be fully isolated from the cluster network. Deny all incoming traffic and block all outgoing traffic except DNS queries on port 53.
Submissions: 19/21
Challenges
Focused, hands-on problems for sharpening your DevOps and server-side skills. Some teach specific concepts while others mirror real-world scenarios. Every challenge includes hints, feedback, and automated solution checks.
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Configure Selective Pod-to-Pod Communication Using NetworkPolicies Under Default-Deny
by Omkar Shelke
Learn how to control traffic between Pods using Kubernetes NetworkPolicy. Apply a default deny-all policy and then selectively allow only the traffic that is required between frontend and backend Pods.
Submissions: 15/17
Control Cross-Namespace Traffic Using NetworkPolicy
by Omkar Shelke
A multi-tier application runs across two namespaces. Learn how to isolate the application tier and restrict database access to only the application namespace.
Submissions: 13/14