P-792H v2 User’s Guide
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CHAPTER 12
VPN
12.1 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 69 VPN: Example
12.1.1 What You Can Do in the VPN Screens
•Use the Setup screen (Section 12.2 on page 157) to view the configured VPN
policies and add, edit or remove a VPN policy.
•Use the Monitor screen (Section 12.7 on page 171) to display and manage the
current active VPN connections.
•Use the VPN Global Setting screen (Section 12.8 on page 172) to allow
NetBIOS packets passing through the VPN connection.
VPN Tunnel
X
Y
Internet
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