The in.timed service provides the server-side of the time protocol. The time server sends to requestors the time in seconds since midnight, January 1, 1900. The time protocol is available on both TCP and UDP transports through port 37.
Once a connection is established, the in.timed sends the time as a 32-bit binary number and closes the connection. Any received data is ignored.
The in.timed listens for UDP datagrams. When a datagram is received, the server generates a UDP datagram containing the time as a 32–bit binary number and sends it to the client. Any received data is ignored.
See attributes(5) for descriptions of the following attributes: