Open Source VPN Software

Outline clients, developed by Jigsaw. The Outline clients use the popular Shadowsocks protocol, and lean on the Cordova and Electron frameworks to support Windows, Android / ChromeOS, Linux, iOS and macOS. The Outline Client is a cross-platform VPN or proxy client for Windows, macOS, iOS, Android, and ChromeOS. The Outline Client is designed for use with the Outline Server software, but it is fully compatible with any Shadowsocks server. The client's user interface is implemented in Polymer 2.0. Platform support is provided by Cordova and Electron, with additional native components in this repository. Outline clients share the same web app across all platforms. This code is located in the src/www directory. If you are making changes to the shared web app and do not need to test platform-specific functionality, you can test in a desktop browser. It provides the "missing Unix pieces" required by build system such as rsync (and many others).

The Proton VPN Browser Extension repository houses the code for an official browser extension that lets users quickly secure their web browsing traffic through ProtonVPN from within browsers like Firefox and Chrome without routing all system traffic. This extension provides users with a convenient way to encrypt and anonymize HTTP requests, hide IP addresses, and prevent tracking while browsing, acting independently of the full OS-level VPN clients. Because browser extensions are constrained by browser APIs, this extension focuses on securing in-browser connections, protecting privacy specifically within the browser context rather than across the entire operating system. Users can sign in with their Proton accounts, choose from available VPN locations, and connect or disconnect from the toolbar with a single click, making it practical for casual privacy protection or geo-unblocking content without installing native applications.

Hypersocket is a streamlined VPN solution built for all types of remote access scenarios. Powerful yet simple to use, Hypersocket uses a single installed client to provide access to any number of network resources. Its powerful granular access means you can have fine grained control over your entire network and remote users. Accessed through a secure HTTPS port, the Hypersocket client provides access to any number of host/port combinations all effortlessly assigned server-side by the Administrator through roles. The Administrator is able to configure the server through a web portal on the same HTTPS port. * Use as a typical VPN solution to replace IPSec type access for a more granular security policy * Use behind a fire-walled WLAN as a BYOD gateway * Use fine grained access to manage who has access to what resource * Keep your network and business safe by denying complete remote access to any user account * Support for Mac and Windows clients

OpenVPN ALS is a web-based SSL VPN server written in Java. It has a browser-based AJAX UI which allows easy access to intranet services. OpenVPN ALS is a direct descendant of Adito, which was a fork of SSL-Explorer.

OAST is a cross-platform front-end (GUI) for OpenVPN-client, allowing to manage multiple. It's quite simple in use and provides base functionality such as monitoring connection status. Application is written in Java so it works on both Windows and Linux

This project focuses on bringing commercial quality L2TP support to Linux and possibly other Unixes. L2TP stands for Layer 2 Tunneling Protocol. It is a VPN similar to PPTP and a number of others. L2TP often competes with PPPoE.