This interface is designed to take as input settings people find in the control panels on their computers, or via terminal commands like ipconfig on Windows and ifconfig on Linux, Unix & Mac OS X.
Specifically, the computer's IP address, and the configured netmask. Based on these two inputs information about the IP subnet the computer is configured to use will be computed.
IP Addresses should be entered as so-called dotted quads, e.g. 192.168.0.10
Netmasks can be entered in a number of formats, corresponding to the different ways the are show in different interfaces on different operating systems. The following examples are all valid 24, 255.255.255.0, ffffff00, 0xffffff00.