ZyXEL Communications LTE3316-M604, Руководство пользователя

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LTE3316 Series User’s Guide
121
C
HAPTER
18
VPN
18.1 Overview
A virtual private network (VPN) provides secure communications between sites without the expense of
leased site-to-site lines. A secure VPN is a combination of tunneling, encryption, authentication, access
control and auditing. It is used to transport traffic over the Internet or any insecure network that uses
TCP/IP for communication.
18.1.1 What You Can Do in this Chapter
• Use the L2TP Server screen to configure the Zyxel Device’s L2TP VPN settings ( Section 18.3 on page
122 ).
• Use the L2TP Client screen to view connection details for L2TP clients ( Section 18.4 on page 123 ).
• Use the GRE screen to enable Generic Routing Encapsulation (GRE) tunnels( Section 18.5 on page
126 ).
• Use the VPN Passthrough screen to allow VPN traffic to pass through the Zyxel Device( Section 18.6 on
page 129 ).
18.2 What You Need to Know
L2TP VPN
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).
L2TP VPN lets remote users use the L2TP client software included with their computers’ operating systems
to securely connect to the network behind the Zyxel Device.
Figure 67 L2TP VPN Overview
LTE