servertest.js

var net = require('net');

var HOST = '127.0.0.1';
var PORT = 6969;

net.createServer(function(sock) {
  // We have a connection - a socket object is assigned to the connection automatically
 console.log('CONNECTED: ' + sock.remoteAddress +':'+ sock.remotePort);
  // Add a 'data' event handler to this instance of socket
  sock.on('data', function(data) {
    console.log('DATA ' + sock.remoteAddress + ': ' + data);
    // Write the data back to the socket, the client will receive it as data from the server
    sock.write('You said "' + data + '"');
  });
  // Add a 'close' event handler to this instance of socket
 sock.on('close', function(data) {
   console.log('CLOSED: ' + sock.remoteAddress +' '+ sock.remotePort);
 });

}).listen(PORT, HOST);

console.log('Server listening on ' + HOST +':'+ PORT);