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Hectal
Phase 4Intermediate5 of 11 in Docker

Docker Networking

How containers talk to each other, to your host, and to the outside world.

Every container gets its own private network stack by default. This phase covers how containers find each other, how ports get published to your host, and the network driver choices that matter in practice.

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3 topics ~41 min 4 code blocks & diagrams
Start with the first topic
1
4.1

Network Drivers: Bridge, Host & None

Docker gives you three fundamentally different ways to wire up a container's networking — picking the right one is a five-second decision once you know what each one actually does.

14 min 1 diagram 1 code practice

2
4.2

Publishing Ports

EXPOSE documents a port; -p actually makes it reachable from outside the container. Getting the host:container order backwards is the single most common Docker networking mistake.

14 min 1 code practice

3
4.3

DNS & Service Discovery Between Containers

On a user-defined network, Docker gives you automatic, name-based service discovery for free — understanding exactly how it works removes a huge amount of Docker Compose 'magic' later.

13 min 1 code practice