If your routing and firewall rules allow it, it should just work. There are several variables to account for though, so we need more details.
list itemPost your server1.conf and client1.conf.
What are you allowing thru the tunnel? Post the firewall rules from the OpenVPN tab on both ends.
Is the remote end using PFsense for DNS or something else? (e.g. AD, Infoblox, etc)