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Reach a Distroless Container's Debug Endpoint From a Sidecar Container
A distroless container serves a debug interface on its own loopback address. Can you reach this debug endpoint using nothing but standard Docker commands?
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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Forward a Port Without Starting a Proxy Process
Prove your networking skills by mapping one network address to another without starting any additional processes.
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Reproduce a Docker Bridge Network Using Basic Linux Commands
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.
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Connect Multiple Network Namespaces
Prove your mastery of Linux and containers by connecting multiple network namespaces into a single network.
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Connect Two Network Namespaces
Prove your Linux networking skills by connecting two network namespaces with a virtual Ethernet device.
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Set Up Network Address Translation (NAT) for a Container
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?
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Create a Linux Network Namespace
Learn how to create fully isolated virtual network environment using Linux network namespaces.