We just released tool to easily create self-signed modern certificates with fast and strong ECDSA asymmetric keys.
Even the tool is build specifically for our VPN Tunnel service for Green Screens Server, generated certificates can be used on any of our products where certificates are used or with any modern web servers.
ECDSA certificates play very well with Nginx, HTTP2 and TLS1.3 for the best performance and extreme security.
NOTE: 256bit ECDSA is equal to RSA 3072bit.