ZyXEL P-661H-D1 User Guide - Page 217
VPN, 16.1 Overview, 16.1.1 What You Can Do in the VPN Screens, VPN Tunnel
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CHAPTER 16 VPN 16.1 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 94 VPN: Example VPN Tunnel X Y 16.1.1 What You Can Do in the VPN Screens • Use the Setup screen (Section 16.2 on page 220) to view the configured VPN policies and add, edit or remove a VPN policy. • Use the Monitor screen (Section 16.5 on page 228) to display and manage the current active VPN connections. P-661HNU-Fx User's Guide 217