echo nps/info/specification.txt | nc nightfall.city 1900 | less

                           THE NPS PROTOCOL

NPS is a tiny internet protocol to post data.

Servers should listen on port 1915. Users connect and send data,
finishing the transmission with a line that contains only a '.' (dot).
The server responds with text and closes the connection.

Here is an example telnet session:
telnet example.com 1915
Hello World!
.