The preparation for establishing an SSL/TLS session is as follows.
Operations on the settings required for SSL/TLS communication should be performed on the controller node.
CAUTION:
To enable an SSL/TLS session, make sure that your server certificate has not expired. If your server certificate has expired, a warning message appears when you try to make an SSL/TLS connection. Moreover, security of the communication is not guaranteed. If your server certificate has expired, repeat the steps in the above flowchart from “Create private keys“ to “Import signed certificates for an SSL/TLS connection”.