@solene @kasperd if I am understand well, to create self signed certificate I have to firstly create my own CA with LibreSSL, then create certificate request for my server no the same local as I create the CA and finally sign CSR to my server with my CA how describes this article https://dev.to/techschoolguru/how-to-create-sign-ssl-tls-certificates-2aai
So to create self signed certificate I have to proceed always these three steps? And the IP will be mentioned in CSR as subjectAltName=