Dears,
I am really need someone help me and advice me, I need to create Openvpn on Centos 7 so I need the basics steps and knowledge ,
Now I will installing Centos 7 and install OpenVPN and certification all of that it's good but I have a issue and Question , let start by Question Do i need a public IP on the openVPn server ! from ISP ? and Do I need to doing anything on the Router ! like as port forward and how !!
I need someone explain to me the basics steps, the issue is while i finished all VPN installation the error shows me the systemctle openvpn could not start.

thanks,