Poptop is an open source implementation of a PPTP server. Running under x86 or embedded Motorola ColdFire architectures Poptop provides full interoperability with the Microsoft PPTP VPN client.
OpenVPN is a robust and highly flexible tunneling application that uses all of the encryption, authentication, and certification features of the OpenSSL library to securely tunnel IP networks over a single TCP/UDP port.
Discussion forums and project wiki can be found here:
https://forums.openvpn.net/
http://community.openvpn.net/openvpn
Rockhopper is IPsec/IKEv2-based VPN software for Linux. This software is interoperable with Windows 7, Windows 8 and Windows 10 VPN clients and it provides a handy AJAX-based Web console to manage Secure Virtual Ethernet(LAN), Routing-based VPN, Remote Access VPN and servers protected by IPsec. No kernel modules are needed. The ESP protocol stack is also implemented in user space.
SSL-Explorer is a fully-featured, web-based SSL VPN server. This project is no longer actively maintained as the SSL-Explorer technology has now been acquired by Barracuda Networks, Inc.
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PHPki is an Open Source Web application for managing a multi-agency PKI for HIPAA compliance. With it, you may create and centrally manage X.509 certificates for use with S/MIME enabled e-mail clients, SSL servers, and VPN applications.
Netdeep Cop is a security network gateway. It features stateful packet filtering, proxies, content filtering, IDS/IPS and VPN. This project has been started with your code based in IPCop and Smoothwall project.
The SLAN project is a GPL open-source project providing a cross platform Virtual Private Networking (VPN) solution focused on providing secured and accountable links over insecure broadcast media such as 802.11 wireless LANs and public ethernets.
Yavipind is a secure tunnel aka 2 peers securely forwarding
packets toward each other.It is what most people calls a VPN (virtual private
network).
It forwards any kind ofpacket (IPv4, IPv6 or other) sent over the virtual
network interface (e.g. t
pam-openvpn is a Linux PAM-module which works together with OpenVPN. With this pam-module it is possible to establish vpn connections when a user logs into a system and tear down the connection when the user logs off. This is ideal for mobile systems.