Vpn Overview; Ipsec; Security Association; Vpn Wizard - ZyXEL Communications ZyWall 35 User Manual

Internet security appliance

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ZyWALL 35 User's Guide

3.3 VPN Overview

A VPN (Virtual Private Network) 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 technologies/services used to transport traffic over

the Internet or any insecure network that uses the TCP/IP protocol suite 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.

A Security Association (SA) is a contract between two parties indicating what security

parameters, such as keys and algorithms they will use.

Use the VPN wizard screens to configure a VPN rule that use a pre-shared key. If you want to

set the rule to use a certificate, please go to the VPN screens for configuration.

Chapter 3 Wizard Setup