To obtain a CA-signed certificate:
Create a Certificate Signing Request (CSR) on the HPDU.
Submit it to a certificate authority (CA). After the CA processes the information in the CSR, it provides you with a certificate.
Import the CA-signed certificate onto the HPDU.
A CSR is not required in either of the following scenarios.
Make the HPDU create a self-signed certificate.
Appropriate, valid certificate and key files are already available, and you just need to import them.