-p [port] specifies the port on which to listenOptional Parameters:
-i [IP address] specifies the interface on which to listen
-r forces the output into a more compact machine readable form
-o the program will exit after the first message received
-t puts times into human-readable format (does nothing if -r)
-c suppresses logging of connection messages
-m suppresses logging of non-connection messages
-s suppresses logging of the source IP address of messages
-h displays a help message