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P-661HNU-Fx User’s Guide
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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
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.
VPN Tunnel
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