Configuration takes place in two phases. Some configuration must be done at the console, including interface configuration and interface IP address assignment. Some configuration steps, such as VLAN and DHCP setup, can be done both at the console and within the web GUI.
Configuration from the console
On boot, you should eventually see a menu identical to the one seen on the CD version, with the boot multi or single user options and other options. After a timeout period, the boot process will continue and you will get an options menu. You should select 1 from the menu to begin interface assignment. This is where the network cards installed in the system are given their roles as WAN, LAN, and optional interfaces (OPT1, OPT2, ...