- Mac OS X 10.1 or later.
- Windows 2000 or NT Server with RAS configured for VPN access. You must have a user account enabled for remote access. The server must have an address on the Internet plus an address on the private network (like a NAT address). NT Server must have a Service Pack that supports encrypted PPTP.
- An Internet (IP) connection between your OS X Mac and the server.
- *If using a NAT router to connect your Mac to the Internet, it must support PPTP. Airport's built-in NAT does not (see Airport workarounds). NAT routers that support PPTP include IPNetRouter (from Sustainable Softworks), Vicomsoft Internet Gateway and SurfDoubler (6.8+), MacSense XRouters, LinkSys routers, Netgear RT311, and Internet Connection Sharing on Windows XP. Port-mapping alone is not enough to support an PPTP connection.