INTERNET DISTRIBUTION USING WIN 2000 ADVANCED SERVER DHCP

PLEASE HELP ME. I AM NEW TO WINDOWS 2000 ADVANCED SERVERS DHCP. I HAVE ALREADY CONFIGURED MY SERVER AS DHCP BUT I CANNOT DISTRIBUTE THE INTERNET TO OTHER COMPUTERS. I DO NOT HAVE ROUTER. THE MODEM IS DIRECTLY CONNECTED TO MY SERVER. SOMEBODY TOLD ME THAT THE SERVER CAN BE CONFIGURED TO ACT AS ROUTER THAT WILL DISTRIBUTE THE INTERNET TO THE OTHER COMPUTERS. BUT I DONT KNOW HOW TO DO THAT, SO PLEASE HELP ME…