This learning path will teach you how to reproduce the most typical container networking setup: the Docker(-like) bridge network. Virtual bridge networks are extremely widespread - most Docker and Podman installations and many Kubernetes clusters (via the corresponding CNI plugin) use them to provide inter-container (or pod) communication within a single host. Understanding the underlying concepts of the bridge network is the key to efficiently troubleshooting container and Kubernetes networking issues.
You'll start with the basics, like creating a network namespace, and then move on to more complex topics, like connecting multiple network namespaces with veth pairs and a bridge device and using iptables to set up network address translation (NAT) and port publishing.
Follow along with a comprehensive tutorial, or start by solving hands-on challenges and come back to the tutorial when you get stuck. Any way you choose, by the end of this skill path, you'll gain a deep understanding of how container networking works under the hood.
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