am a new Ubuntu Linux server user. How do I setup an OpenVPN Server on Ubuntu Linux version 14.04 or 16.04/18.04 LTS server to shield my browsing activity from bad guys on public Wi-Fi, and more?
am using UFW to manage firewall on my Ubuntu Linux 12.04/14.04 LTS server. I need to block a specific IP address from accessing my server. How do I block an IP address using ufw?