WireGuard is a modern VPN protocol built into the Linux kernel since version 5.6, offering a significantly smaller codebase, faster handshakes, and lower latency compared to OpenVPN or IPsec. This guide sets up a WireGuard server on Ubuntu 26.04, generates key pairs for the server and a client, configures IP forwarding, and walks through connecting a client device with a verified tunnel. Install WireGuard WireGuard is available directly from Ubuntu 26.04's default APT repository. 1. Update the APT package index: $ sudo apt update Enter fullscreen mode Exit fullscreen mode 2. Install WireGuard: $ sudo apt install wireguard -y Enter fullscreen mode Exit fullscreen mode Configure the WireGuard Server The server configuration requires generating a key pair, identifying the active network interface, and creating the wg0 interface configuration file. 1.…