Then, look for the “Suggest IP Addresses” button. Of course, this host name or domain name must be accessible from the Internet. You only need to provide the Host Name for your VPN Server. VPN Enabler now supports both L2TP and PPTP protocols. What VPN Enabler does is to do all that stuff for you in just three (OK, maybe four) steps and just one click. There is a VPN Server built into every plain Mac OS X machine, only it's not activated unless you know how to type in a lot of geeky commands and dive into a lot of configuration files.
