By default, Harbor, running as a Docker container on the provided Registry VM, handles Pull/Push requests. However, to access Harbor from an external server, you need the Harbor SSL certificate.
1) Connect to the provided Registry VM and download the ca.crt file from the /etc/docker/certs.d/[IP] directory.
1) Upload the downloaded ca.crt file to the /etc/docker/certs.d/[IP] directory on the external server, similar to the configuration on the Registry VM.
2) Restart the Docker service on the external server.
3) Log in to Docker using the docker login command.