Letsencrypt The command creates a secure Opportunistic Connection between the hosts commonly referred to
as client and server. The client connects to the server and remains anonymous, whereas the server is
authenticated before connecting to it. The server is not anonymous. The server uses Let's Encrypt
certificates for authentication and encryption purposes.
The --client operation is used for initial client setup.
The --server operation is used for initial server setup.
The --test operation is used for testing the configuration/connection.
The --generate-certificatehostname operation is used for generating the certificate for the hostname.
The --renewhostname operation is used for updating the generated certificate, it keeps the private key
same.
The --disable operation is used for disabling IPsec service.
The --help operation is used for displaying all the available options.