Docker offline network

Question

How can I create network without connect to internet?

I have 2 docker networks offline and online and i need disable internet connection for all containers in my offline network

And I have docker-compose file like that

some_offline_container:
    build:
      context: ./offline/first-container
    networks:
      - offline
 networks:
    online:
    offline:

Answer 1

Is the internal flag sufficient for your use case?

When you specify this option you create a network that doesn’t allow access to communicate with external networks. In the following example, you would have an isolated network called my_internal_network without internet access.

version: '3'
services:
  h1:
    image: "httpd"
    networks:
      - my_internal_network
  h2:
    image: "httpd"
    networks:
      - my_internal_network
  h3:
    image: "httpd"
    networks:
      - my_network
networks:
  my_internal_network:
    driver: bridge
    internal: true  # restrict external access to the network
  my_network:
    driver: bridge