@arubislander I have teste both ProtonVPN and nordVPN on Xenial (don't ask) ans Focal.
- ProtonVPN (latest) doesn't work for me. I think i because of the cyphering
AES-256-GCM
which is ¿not available on UT? - NordVPN
- works on Focal importing the ovpn file (quite hidden in the manual setup, but well) and adding IKE v2 username/password
- works on Xenial but you need to install VPN editor, and set Security/HMAC auth to SHA-512