PFSense + OpenVpn: limit the visibility to a single ip

[Symon_]

with the conjuntion of OpenVPN and PFsense, i've done a vpn server.

Now, i want that all my clients, will connect to the server and see only a specific IP.

To reach my goal, i've modified the Firewall Rule to have on the destination only the specified server (ex.: 10.0.0.1), the vpn works and i'm able to see only the server.

But, my vpn config, it's propagating also the dns, and, now i'm not able to reach internet, ping 8.8.8.8 and external services, my question is: how i can fix the dns resolution?

It's better to propagate or not the dns from the openvpn server?

Thanks.