in reply to Re^2: Proving a UDP port is closed
in thread Proving a UDP port is closed
The netstat command shows network information and is not concerned with what services/processes are running. Also, inetd isn't magical and can't establish a connection without a listener. In order for the server to accept connections on a port then there has to be a listener for that port. The netstat command can be used to show what listeners are out there.
As far as proving it by attempting to connect to it, I would have no way of testing presently.