Requirements for DigiTunnel 1.5

• Mac OS X 10.3 or later, compatible with 10.4 (Tiger) and Intel Macintosh (Universal).
  
  
• PPTP VPN server such as Windows 2000 or NT Server with RAS configured for VPN access, or other compatible PPTP server such as TrendNet, Watchguard Firebox or Nortel (see compatibility list). 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 pass-through. Older Airports may not (see Airport workarounds). NAT routers that support PPTP include XRouter, IPNetRouter (from Sustainable Softworks), Vicomsoft Internet Gateway and SurfDoubler (6.8+), MacSense XRouters, LinkSys routers, Netgear RT311, Airport Extreme, Snow Airport (with update) or later, and Internet Connection Sharing on Windows XP. Port-mapping alone is not enough to support an PPTP connection.