Wireguard

WireGuard is a free, open-source VPN (Virtual Private Network) software that enables secure communication over the internet. It is designed for ease of use and high performance, making it a popular choice among users.

Combined, WireGuard and Raspberry Pi 4 provide a secure and cost-effective solution for setting up a VPN. The low power consumption of the Raspberry Pi 4 makes it an ideal choice for running a VPN server, and WireGuard's lightweight code and simple configuration make it easy to set up and maintain. This combination is perfect for those who want to protect their internet traffic while maintaining the versatility and affordability of the Raspberry Pi.