Think of it like a circular driveway that does not connect to the network of roads. Loopback Interface – Used to connect one network interface back to the same internal network interface.
Think of it like a driveway that connects to the network of roads. Ethernet Interface – Used to connect one network interface to other external network interfaces.Bridge Interface – Used to connect multiple networks together so they function as a single network.This is the least secure docker network type and should be used with caution. The container can bind to protected ports on the host, but not modify the network interfaces. Docker Network Type: Open – A container that has full access to the host’s network interface bypassing the docker virtual network.Use when two containers need to communicate directly through the shared loopback interface. The containers still have their own isolated memory and file systems. Docker Network Type: Joined – Two or more containers that share the same loopback and ethernet interfaces.Use when your container does not require network access. Programs running inside the container cannot connect out. Nothing outside the container can connect in. Docker Network Type: Closed – A container that has a loopback interface but not an ethernet interface.They are not accessible from the host machine by default. All containers using this type are part of Docker’s virtual network and can communicate with one another. Docker Network Type: Bridged – A container that has both a loopback interface and an ethernet interface that is connected to the docker bridge interface.Each configuration has different security implications.
Terminology Docker Network Typesĭocker provides four different network configurations. I’ve included some basic network terminology, which is not directly related to Docker, for some extra background.
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In my last post, I showed you how to have persistent storage for your containers. Welcome back to my Docker Bootcamp Series.