ZyXEL Communications wireless n gigbit router zyxel manual IPSec VPN, 195

15

IPSec VPN

15.1 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.

Internet Protocol Security (IPSec) is a standards-based VPN that offers flexible solutions for secure data communications across a public network like the Internet. IPSec is built around a number of standardized cryptographic techniques to provide confidentiality, data integrity and authentication at the IP layer.

The following figure provides one perspective of a VPN tunnel.

Figure 128 IPSec VPN: Overview

The VPN tunnel connects the NBG-460N (X) and the remote IPSec router (Y). These routers then connect the local network (A) and remote network (B).

15.2What You Can Do

•Use the General screen (Section 15.4 on page 198) to display and manage the NBG-460N’s VPN rules (tunnels).

NBG-460N User’s Guide

195