The docker daemon is usually run as a service on the local machine, we could check it using the below command:


We can communicate with the docker daemon using the CLI interface for example "docker ps" to list our containers.

The CLI uses the local Unix socket - /var/run/docker.sock - to communicate with the docker daemon.

To be able to communicate with our daemon from another machine, we would have to do it through a TCP socket/port - default docker port : 2375 - so the full address would be - docker_host_ip:2375 -.

To make it work, we would need to define the below environment variable:


Now we could use the command "docker ps" from our external host.

Securing your external connection from a remote host:

The below address connects to the docker host on the secure port "2376":


The port "2376" handles encrypted communications.

We could mention these when running docker manually using the "dockerd" command:


Remark:

We need to create the above certificates for the server - servercert.pem, serverkey.pem -  for the connection to go through
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