ZyXEL Communications VSG1432-B101 Series IPSec, 21.1 Overview, 21.1.1What You Can Do in this Chapter

21

IPSec

21.1 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 is an example of an IPSec VPN tunnel.

Figure 113 VPN: Example

VPN Tunnel

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21.1.1What You Can Do in this Chapter

•Use the Status screen to display and manage the current active VPN connections (Section 21.2 on page 247).

•Use the Settings screen to view the configured IPSec policies and add, edit or remove a policy (Section 21.3 on page 248).

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VSG1432-B101 Series User’s Guide