I tried your tutorial here: http://wiki.debian.org/HowTo/iPhoneVPNServer
But I can't get it to work. I have slightly different setup then the one you wrote the tutorial for. Maybe I just made something wrong because of my different setup.
My setup is: A rented a Debian VPS and I want to use it to connect with my iPhone/Mac using VPN. So there is no router that I know in between. Its the Debian server, the Internet and my devices as clients.
Do you know what I need to do differently?