ZyXEL Communications USG 2000 L2TP VPN, 31.1 Overview, 31.1.1What You Can Do in this Chapter, 31.1.2What You Need to Know

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L2TP VPN

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 379 L2TP VPN Overview

31.1.1What You Can Do in this Chapter

•Use the L2TP VPN screen (see Section 31.2 on page 519) to configure the ZyWALL’s L2TP VPN settings.

31.1.2What 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 Chapter 25 on page 441 for information on IPSec VPN.

IPSec Configuration Required for L2TP VPN

You must configure an IPSec VPN connection for L2TP VPN to use (see Chapter 25 on page 441 for details). The IPSec VPN connection must:

• Be enabled.

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