Site to Site VPN
I have read the documentation: https://doc.pfsense.org/index.php/OpenVPN_Site_To_Site, but still have a question. In order for this to work, do I create the server Rule on the pfSense and a firewall rule to allow OpenVPN through? I'm looking for what I need to do on the pfSense firewall.
Yep. Just create a * * * rule on the OpenVPN interface (or limit it however you want.) Until you do, no traffic will pass on it.