VPN OCI and on-prem pfSense

Hi gays.

I’m trying to connect OCI and an on-prem pfSense box (for learning purposes).
When I try to create a CPE in OCI I only have the option to specify the public IP address of the pfSense box. My public IP is dynamic :frowning: I have dynDNS set up via cloudflare and that points to my current public IP. Does anyone know if there is any way to use hostname instead of IP in OCI?

Thanks.