User guide

User Guide 63
5 Network Settings
About network interface setup
A primary component of the WatchGuard Firebox setup is the configuration of network interface IP addresses.
When you run the Quick Setup Wizard, the external and trusted interfaces are set up so traffic can flow through
the Firebox. You can use the procedures in this section to change this configuration after you run the Quick
Setup Wizard, or to add other components of your network to the configuration. For example, you can set up
an optional interface for public servers such as a web server.
A firewall physically separates the networks on your Local Area Network (LAN) from those on a Wide Area
Network (WAN) like the Internet. One of the basic functions of a firewall is to move packets from one side on
the firewall to the other. The common name for this is routing. To route packets correctly, the firewall must
know what networks are accessible through each of its interfaces.
The Firebox has three basic types of interfaces:
External
Connects the Firebox to an external Internet service provider (ISP). To configure the external
interfaces, see Configure external interfaces
Trusted
Connects the Firebox to trusted computers that you want to secure. To configure trusted interfaces,
see About configuring the trusted network
Optional
Connects the Firebox to computers with “mixed trust.” For example, customers frequently use the
optional network for their remote users or for public servers such as a web server or email server. To
configure the optional interfaces see About configuring the optional network