The browser is connecting to 127.0.0.1 in the main, default network namespace.īut those are different interfaces, so no connection is made. Now it’s clear why there’s a connection refused: the server is listening on 127.0.0.1 inside the container’s network namespace. The resulting network setup looks like this: Your operating system has multiple network “interfaces”.įor example, on my computer (with output shortened for clarity): Docker runs on non-Linux OSes like macOS by running a Linux virtual machine, but the practical consequences are the same. I’m going to assume the main OS is Linux, for simplicity of explanation. ![]() Let’s start with our first scenario: you run a server directly inside your operating system, and then connect to it. How to fix your image so the server is accessible. ![]()
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