Open Source Rust VPN Software

VPNCloud is a peer-to-peer VPN solution that uses UDP tunneling to create secure, distributed virtual networks. Unlike traditional VPNs, VPNCloud creates mesh-like connections between nodes and is particularly useful for remote access, private networks, or IoT environments. It supports both encrypted and plaintext tunnels, dynamic peer discovery, and flexible routing. With minimal configuration, VPNCloud provides a lightweight way to link multiple machines across the internet as if they were on the same LAN.

BoringTun is a high-performance, portable implementation of the WireGuard VPN protocol written in Rust, designed so that developers and system integrators can run WireGuard tunnels entirely in user space across a variety of operating systems without kernel modules. It implements the core WireGuard protocol — including key exchange, encryption (ChaCha20-Poly1305), and authenticated transport — while omitting platform-specific tunneling stacks, allowing embedment in custom VPN client applications or userspace networking tools. The repository includes both a library for programmatic use and a command-line executable that can act as a userspace WireGuard interface on supported platforms like Linux and macOS. Because it’s written in Rust, BoringTun benefits from strong safety guarantees, memory safety without garbage collection, and cross-platform support, making it suitable for mobile, desktop, and server environments.

AdbTether lets your Windows PC use your Android phone's internet — including the VPN on the phone. No root, hotspot, or VPN client on the PC. Connect your phone, enable debugging, and press Connect. Everything your PC does online goes through the phone: browsing, apps, updates, calls. If the phone is on a VPN, PC traffic exits through it too, so the PC shares the phone's VPN and exit location. Nothing is installed on the phone: a small helper runs on demand, so Android's battery saver cannot freeze it. On the PC it sets up a virtual network connection in the background. If the link drops, the PC stays offline instead of falling back to the local network, so traffic cannot leak out. IPv6 is blocked and address lookups stay inside the tunnel. Disconnect removes the routes and DNS settings it added; close the app and the PC is back on its normal network. Free and open source (MIT). Needs Windows 10 1809+ / 11 (64-bit) and an Android phone with USB or Wi-Fi debugging.