OpenVPN is a free and open source virtual private network protocol, aimed towards advanced users. It offers strong encryption as well as many advanced options, but requires installation of it's own win32-client and fairly hard to configure. If you aren't familiar with networking and crypto, we suggest you to use PPTP or IPSec.
This is why we offer a preconfigured OpenVPN package where everything is included.
Here is the quick notes on connecting to Ivacy using this preconfigured package:
If you prefer to setup your OpenVPN connection manually, here is all the required configuration files: