CentOS 7 OpenVPN

yum install epel-release

yum install openvpn

In pfSense - download file from VPN > OPenVPN > Client > Inline > Most Clients (for example test.ovpn)

mv test.ovpn /etc/openvpn/test.conf

Add new user in pfSense "System Manager" and write down user and password

openvpn --config /etc/test.conf # enter you username and password when prompted