The in.discardd service provides the server-side of the discard protocol. This protocol is used for debugging and bandwidth measurement and is available on both TCP and UDP transports through port 9.
The discard service simply throws away any data it receives from the client.
Once a connection is established, the in.discardd discards any data received. No response is generated. The connection remains open until the client terminates it.
The in.discardd listens for UDP datagrams. When a datagram is received, the server discards it. No response is sent.
See attributes(5) for descriptions of the following attributes: