clients

hello, I am new to Freeradius, I am trying to use NTRadPing testing tool to send packets to my Freeradius server. I keep getting Ignoring request to authentication address * port 1812 from unknow client error message. So, the question you will ask me is did I add the client to the client.conf file. I thought I did but maybe not corectly. this is what I added to my client.conf file client ip address { secretname = testing123 shortname = private-network } is this correct?