This document describes how to configure both the DSR router and a client's iPhone to estab- lish an encrypted L2TP VPN tunnel between the two devices.
L2TP/IPsec with iOS. With your iPad or iPhone you can use Perfect Privacy VPN without additional software or apps. You just have to enter your login credentials ...
Start the L2TP Connection · On the iOS device, select Settings > General > VPN. · Select the L2TP VPN profile to use. · Swipe Status to Connecting.