Ipsec Vpn; Chapter 21 Ipsec Vpn; Ipsec Vpn Overview; What You Can Do In The Ipsec Vpn Screens - ZyXEL Communications ZyWall USG 2000 User Manual

Unified security gateway

Hide thumbs Also See for ZyWall USG 2000:

Table of Contents

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 is an example of an IPSec VPN tunnel.

Figure 209 IPSec VPN Example

The VPN tunnel connects the ZyWALL (X) and the remote (peer) IPSec router (Y).

These routers then connect the local network (A) and remote network (B).

• Use the VPN Connection screens (see

which VPN gateway a VPN connection policy uses and which devices (behind the

IPSec routers) can use the VPN tunnel and the IPSec SA settings (phase 2

settings). You can also activate / deactivate and connect / disconnect each VPN

connection (each IPSec SA).

ZyWALL USG 2000 User's Guide

IPSec VPN

Section 21.2 on page

332) to specify

Zywall usg 1000