Verbind met de repossitory:
yum -y install epel-release

Installeer de client software:
yum -y install openvpn

Maak de configuratiefile aan:
vi /etc/openvpn/somevpnsite.conf

en zet hier in:

dev tun
tls-client

remote server.example.com 1194

pull

proto udp
lport 123
script-security 2

dh dh2048.pem
ca OpenVPN_CA.crt  
cert OpenVPNclient.crt  
key OpenVPNclient.key

comp-lzo

reneg-sec 0

auth-user-pass somemore.txt

De username en password zet je in somemore.txt

vpnusername
Pa5SW0rd

haal de certificaten over van de server en/of de CA server:
dh2048.pem
OpenVPN_CA.crt
OpenVPNclient.crt
OpenVPNclient.key

start de net geconfigureerde VPN tunnel door:
systemctl enable openvpn@somevpnsite.service
systemctl start openvpn@somevpnsite.service

https://blog.yibi.org/tag/openvpn-client-on-centos-7