certgen
certgen is a simple tool to generate self-signed certificates, and provides SAN certificates with DNS and IP entries.
Install
Download certgen for your specific operating system and platform.
Example
certgen -ca -host "10.10.0.3,10.10.0.4,10.10.0.5"A response similar to this one should be displayed:
2020/11/21 10:16:18 wrote public.crt
2020/11/21 10:16:18 wrote private.key