In order to enable the dynamic configuration of new machines connected to your LAN (Local Area Network), you will need to configure a DHCP server on your firewall. When those machines are configured to use a DHCP server on boot up, they will automatically be set up with all the network parameters they need to integrate the LAN. Then, you only need to configure the clients to use a DHCP server. This feature is available on most modern operating systems.
Simply choose whether you wish to use (or not) a DHCP server by selecting Yes or No and by clicking on the Next button.