OpenVPN

OpenVPN is a VPN protocol that is open-source. This means the source code is openly available for anyone to access and develop.
An active community has formed around the OpenVPN project, which has kept it up-to-date and provided regular security audits to ensure it’s viability.
It is particularly known for its security and privacy as well as its adjustability.
OpenVPN typically works on any port and has five encryption algorithms to such as SSL, IPSec or SSH
For the best security and privacy, you should use AES 256-bit encryption, which is essentially unbreakable and should also use a TCP 443 port.
The TCP 443 port will make your connection similar to an https connection. It is essentially a secure connection which can help prevent website blocking and can help you bypass censorship.
For greater speed, it is recommended to use UDP ports, and you can select the default, Blowfish-128 cipher. This isn’t the absolute highest level of security, but for most people, it will suffice and will operate significantly faster than AES 256 on TCP.