Question

How to disable networking stack for a docker container

Answer 1

If you want to completely disable the networking stack on a container, you can use the --network none flag when starting the container. Within the container, only the loopback device is created. Here's an example-

$ docker run --rm -dit \
  --network none \
  --name no-net-alpine \
  alpine:latest \
  ash

When you execute some common networking commands and check the containers network stack, you will find there's no network created.