L2Tp Vpn; Chapter 22 L2Tp Vpn; Overview; What You Can Do In This Chapter - ZyXEL Communications ZyWall ATP series User Manual

22.1 Overview

L2TP VPN uses the L2TP and IPSec client software included in remote users' Android, iOS, Windows or
Mac OS X operating systems for secure connections to the network behind the Zyxel Device. The remote
users do not need their own IPSec gateways or third-party VPN client software.
Figure 289 L2TP VPN Overview

22.1.1 What You Can Do in this Chapter

• Use the L2TP VPN screen (see
settings.
• Use the VPN Setup Wizard screen in Quick Setup
Device's L2TP VPN settings.

22.1.2 What You Need to Know

The Layer 2 Tunneling Protocol (L2TP) works at layer 2 (the data link layer) to tunnel network traffic
between two peers over another network (like the Internet). In L2TP VPN, an IPSec VPN tunnel is
established first and then an L2TP tunnel is built inside it. See
IPSec VPN.
IPSec Configuration Required for L2TP VPN
You must configure an IPSec VPN connection prior to proper L2TP VPN usage (see
421 for details). The IPSec VPN connection must:
• Be enabled.
• Use transport mode.
• Use Pre-Shared Key authentication.
Section 22.2 on page
(Chapter 4 on page
ZyWALL ATP Series User's Guide
421
C
H A P T E R

L2TP VPN

422) to configure the Zyxel Device's L2TP VPN
70) to configure the Zyxel
Chapter 20 on page 379
22
for information on
Chapter 22 on page