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.
A web app is listening inside a container, but the browser can't reach its IP address. Recreate the container so the app is available on port 80 of the Docker host.
Configure a Linux NAT gateway to give Internet access to private RFC 1918 networks while keeping them hidden from the outside world.
The culmination of the Docker networking challenges series. Can you create a Docker-like bridge network from scratch and using nothing but basic Linux commands.
There is a container that can reach the host only through its veth pair and cannot call any other addresses. Can you connect it to the outside world?
