I'm having troubles connecting to our corporate VPN on an I-Phone 5. Our current setup is a L2TP w/ PSK and certificate for authentication. The VPN at the office is made up of a RAS server, hosted on Windows 2003 and a certificate server that goes out on a dedicated public IP address that the outside world can see. The problem with any VPN software on Apple and Android phones, is there is no setup that only looks for a certificate, it always asks for a password for authentication. There is no password in this case, thats what the certificate is for. Has anyone run into this or have any ideas? I've tried multiple VPN clients in the App Store, but maybe I missed one. Also, I was able to get it to work on a MacBook Pro on the Snow Leopard OS so I would think there would be a way to get this to work.