The final numbers (''network'' and ''broadcast'') can be set by simply using 0 and 255 respectively for the last number. Finally, the ''gateway'' is the IP address of the router used to access the internet. This can be accessed from the router settings. The ''gateway'' should NOT be set for a '''Virtual Machine''' through VirtualBox. It should only be set for an actual computer. The gateway is typically the same first three numbers as the IP address with a ''1'' as the last number.