Eicon Networks SHIVA 1100, Administrator'S Manual, Page: 75 / 136

IPSec
System Administrator’s Guide 75
IPSec
There are many possible scenarios for making use of IPSec. The most common is
described in this section. Additional options are also be explained throughout this
example, should it become necessary to configure the tunnel with those settings.
Scenario
This scenario demonstrates how to link two offices via the Internet using IPSec. This
provides a secure tunnel through which users on both networks can share data and
resources.
To combine the Headquarters and Branch Office networks together, an IPSec tunnel
must be configured on both Shiva VPN Gateways.
Set up the branch office
Enable IPSec
1 Click the IPSec link on the left side of the web-based management console.
Shiva 500 VPN Gateway
Modem
Shiva 500 VPN Gateway
Internet
Internet
Modem
Head Office Branch Office
Internet IP address: 209.0.0.1
Internal Network: 192.168.1.0 Internet IP address: Dynamic
Internal Network: 192.168.2.0