Openvpn issues

I have a couple issues.

  1. how to set up my openvpn server to accept both certificate and username/password. if that is not possible then can it be set up to require username/pw and how to setup multiple username/pw so I can track who logs in to vpn

  2. how to edit/set up openvpn to use FQDN (I use DDNS) instead of IP address.

There is no way to support multiple usernames and passwords.
You can edit OVPN’s configuration file directly and replace the server address with FQDN.

How about try WireGuard Server, which can track who connect the WireGuard Server.
WireGaurd is much faster than OpenVPN.