sorry forgot (cuz im also workin now )what u add on internal server is the ip adress wich u assigned to ur pc.
some routers have a fixed ip range u can use for hosting dmz.others allow all ip adresses .if ur router has ip of say 192.168.0.0 then u can make ur ip say 192.168.0.3 the gateway probably must be 255.255.255.0 dns most times automatic for some providers specified.dont need domain name wins or all that **** just default.u can fill this lot in at tcp/ip properties.this example of ip 192.168.0.3 thats what u fill in then at internal server.
