User guide

Chapter 3: Getting Started
30 WatchGuard Firebox System
When you add a secondary network, you map an IP address from the
secondary network to the IP address of the Firebox interface. This is
known as creating (or adding) an IP alias to the network interface. This IP
alias becomes the default gateway for all the machines on the secondary
network. The presence of a secondary network also tells the Firebox that
another network resides on the Firebox interface wire.
You add secondary networks in the following two ways:
• The QuickSetup Wizard, which is part of the installation process, asks
you to enable the checkbox if you have “an additional private
network behind the Firebox” when you are entering the IP addresses
for the Firebox interfaces. The additional private network you specify
becomes the secondary network on the Trusted interface. For more
information on the QuickSetup Wizard, see “Running the QuickSetup
Wizard” on page 35.
• After you have finished with the installation, you can add secondary
networks to any interface using Policy Manager, as described in
“Adding Secondary Networks” on page 57.