Open Source C++ VPN Software

Amnezia is an open-source VPN client, with a key feature that enables you to deploy your own VPN server on your server.

SSL VPN Client for Windows (OpenVPN).

Connect team members from anywhere in the world on any device. ZeroTier creates secure networks between on-premise, cloud, desktop, and mobile devices. ZeroTier combines the capabilities of VPN and SD-WAN, simplifying network management. Enjoy flexibility while avoiding costly hardware vendor lock in. Set up ZeroTier in minutes with remote, automated deployment. Emulates Layer 2 Ethernet with multipath, multicast, and bridging capabilities. ZeroTier’s zero-trust networking solution provides scalable security with 256-bit end-to-end encryption. Simplify your network stack by unifying VPNs, VLANs, and SD-WANs with one solution. Easily build common backplane networks spanning multiple cloud providers. Easily provision and de-provision remote access for users, contractors, and partners. Save on performance, storage, and bandwidth by unifying on-prem with cloud. Administrate and debug from anywhere.

A tunnel which turns UDP traffic into encrypted fakeTCP/UDP/ICMP traffic by using Raw Socket, helps you bypass UDP FireWalls(or unstable UDP environment). When used alone, Udp2raw tunnels only UDP traffic. Nevertheless, if you used udp2raw + any UDP-based VPN together, you can tunnel any traffic(include TCP/UDP/ICMP), currently, OpenVPN/L2TP/ShadowVPN and tinyfecVPN are confirmed to be supported. Linux host (including desktop Linux,Android phone/tablet,OpenWRT router,or Raspberry PI) with root account or cap_net_raw capability. ICMP/FakeTCP headers help you bypass UDP blocking, UDP QOS or improper UDP NAT behavior on some ISPs. In ICMP header mode,udp2raw works like an ICMP tunnel. UDP headers are also supported. In UDP header mode, it behaves just like a normal UDP tunnel, and you can just make use of the other features (such as encryption, anti-replay, or connection stalization).

Trojan is a lightweight C++ tool using the Trojan-GFW protocol, which masquerades proxy traffic as HTTPS to evade censorship. It supports forward and reverse proxy modes, password-based authentication, TLS encryption, IPv6, WebSocket transports, multiple connections, and DNS over HTTPS, and is compliant with RFC standards. Used primarily for bypassing network restrictions.

Lokinet is a privacy-focused, onion-routing network protocol that enables users to browse the internet anonymously. It facilitates secure and private communication by routing traffic through multiple nodes, concealing users' IP addresses. Lokinet is powered by a decentralized network of staked nodes. Nobody can shut it down. Nobody can spy on you. Lokinet traffic is onion-routed. Your browsing is private, secure, and anonymous. Lokinet hides your IP. Lokinet hides the IPs you connect to. Your location and identity are unknown.

OpenVPN v2.3.18 was the last version that officially supports Windows XP and Windows Server 2003. We lately had the need to use the newer version 2.5.4 of OpenVPN to support stronger data ciphers like AES-256-CBC. Therefore we decided to rebuild the whole package from the ground up to make it compatible with Windows XP and Windows Server 2003. The following article describes in detail how you can rebuild OpenVPN v2.5.4 for use on these older operating systems. The benefits of this new version include: - support of stronger data ciphers like AES-256-CBC - new TAP-Driver with a network speed of 1 GBit/s instead of 10 MBit/s - severe bug on Windows XP SP3 solved where we can't connect to the VPN server For more details visit https://openvpn-for-windows-xp.sourceforge.io/

VPN client for Small HTTP server Small HTTP server includes a VPN server that works on the https protocol. This is a client application for this server.

It provides a system tray icon in the notification area from which a non privileged user can establish and bring down L2TP over IPsec VPN connections. There is also a 'Edit connections' menu item. In order to bring up the editor dialog, a non privileged user must authenticate as root. From there the user can add, remove and edit vpn connections. Editing allows configuring various options for IPsec, L2TP and PPP. Among others, the user can configure eg. the gateway, the use of either PSK or a certificate for authentication, various L2TP options as redial- timeout and attempts and of course all important PPP options. It also allows you to configure PPP for tunnel splitting because you can add routes as you want. When applying your settings, all necessary configuration files are written accordingly (ipsec.conf, xl2tp.conf, options.xl2tpd, opensc.conf up and down scripts ...). It relies on Openswan and xl2tp packages as the underlying protocol handlers.

This daemon is exclusively used by the L2TP over IPsec Manager GUI application in order to execute openswan and xl2tp commands as root on behalf of the GUI client.

OpenVPNClient is a software designed to build IPSec VPN tunnel with VPN server(such as Openswan,Cisco VPN etc) for windows platform.

This application providet simple VPN functionality

VpnFE is a front-end for the Cisco-compatible VPN client, VPNC. It is written in C++ and QT3.

The program to verify and control the Internet connection via VPN and Dialup

Vcn = Virtual computer Network will protect your computer from all malware and hackers by setting up 3 virtual empty computers and the integrated vpn for privacy will protect you from isp eavesdropping and other people interrested in tracking you

VpnTrustee is a multiplatform OpenVPN GUI which makes usage of OpenVPN much more easier. LEGAL NOTICE: This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit. (http://www.openssl.org/)

OmniEdge is an Open source p2p layer 2 , zero-config mesh VPN infrastructure, a traditional VPN, AWS VPC, Ngrok, DDNS alternative. No central server, easy to scale with less maintenance. What happens in intranet, stays in in intranet.