Proxicast LAN-Cell 2 User's Guide download pdf (Page 209)

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LAN-Cell 2 User’s Guide

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CHAPTER 10

IPSec VPN Config Screens

10.1 IPSec VPN 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 provides one perspective of a VPN tunnel.

Figure 123 VPN: Example

The VPN tunnel connects the LAN-Cell (X) and the remote IPSec router (Y). These routers

then connect the local network (A) and remote network (B).

10.1.1 What You Can Do in the IPSec VPN Screens

• Use the VPN Rules (IKE) screens (see Section 10.2 on page 212) to manage the LAN-

Cell’s list of VPN rules (tunnels) that use IKE SAs.

• Use the VPN Rules (Manual) screens (see Section 10.3 on page 227) to manage the

LAN-Cell’s list of VPN rules (tunnels) that use manual keys. You may want to configure a

VPN rule that uses manual key management if you are having problems with IKE key

management.

• Use the SA Monitor screen (see Section 10.5 on page 231) to display and manage active

VPN connections.

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