ZyXEL Communications ZyXEL ZyWALL 35 - Manual (Page 84)

ZyWALL 35 User’s Guide
82 Chapter 3 Wizard Setup
Figure 16 Internet Access Wizard Setup Complete
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.
3.3.1 IPSec
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.
3.3.2 Security Association
A Security Association (SA) is a contract between two parties indicating what security
parameters, such as keys and algorithms they will use.
3.4 VPN Wizard
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.