L2Tp Vpn; Overview; What You Can Do In This Chapter; What You Need To Know - ZyXEL Communications ZYWALL USG 1000 - EDITION 2 Manual

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H A P T E R

31.1 Overview

L2TP VPN lets remote users use the L2TP and IPSec client software included with
their computers' operating systems to securely connect to the network behind the
ZyWALL. The remote users do not need their own IPSec gateways or VPN client
software.
Figure 373 L2TP VPN Overview

31.1.1 What You Can Do in this Chapter

• Use the L2TP VPN screen (see
ZyWALL's L2TP VPN settings.

31.1.2 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 Configuration Required for L2TP VPN
You must configure an IPSec VPN connection for L2TP VPN to use (see
on page 443
• Be enabled.
ZyWALL USG 1000 User's Guide
Section 31.2 on page
Chapter 25 on page 443
for details). The IPSec VPN connection must:
31

L2TP VPN

525) to configure the
for information on IPSec VPN.
Chapter 25
523