Amrita VPN is an easy-to-use open source VPN solution that runs on the GNU/Linux platform. The implementation is fully in userspace and requires no kernel patches or enhancements. It uses SSL for strong encryption and authentication.
Amrita VPN can be used to connect two private networks through a public network such as the Internet. It requires only one end to have a direct Internet connection preferably with a permanent public IP address. The other end could be connected to the Internet via a masquerading router.
