Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
The legend on the LAN interface wizard setup page says:
Type dhcp if this interface uses DHCP to obtain its IP address.
If I enter "dhcp" in the field I get an error claiming it's an invalid IP address.