There are various OpenVPN configuration tutorials around the Internet, this post aims to fill in the gaps on how to configure the OpenVPN server, and OpenVPN for Android clients, while managing a simple firewall configured with UFW running an Arch Linux system.
Introduction OpenVPN is a robust and highly flexible VPN daemon. OpenVPN supports SSL/TLS security, Ethernet bridging, TCP or UDP tunnel transport through proxies or NAT, support for dynamic IP addresses and DHCP, scalability to hundreds or thousands of users, and portability to most major OS platforms.