IPSec with AES encryption is considered secure, despite rumors that the NSA deliberately weakened the protocol.
L2TP/IPSec uses a process called double encapsulation: firstly it establishes a PPP connection, and, secondly, it uses IPSec for encryption. That is why L2TP is usually paired with IPSec, an encryption protocol, to secure the data passing the VPN tunnel. L2TP (Layer 2 Tunneling Protocol) is a VPN protocol derived from PPTP (Point-to-Point Tunneling Protocol) that does not offer any encryption by itself.
Add a new connection by clicking on the “+” button.Open System Preferences > Network window.Option 1: Manually set up the L2TP connection on your Mac:.Setting up L2TP on Mac is easy and the following options are available: It also explains the available L2TP authentication options, how to manually set L2TP VPN on Mac, and what alternatives you may consider. This short tutorial shows how to set up an L2TP VPN connection on your Mac.