how to hook up a lister on the socket that comes from connection

gistfile1.txt

var net = require('net')
var server = new net.Server()
server.listen(2020)
server.on('listening', function() {console.log('listening')})
server.on('connection', function(socket) {console.log('connected '+socket)})
server.on('close', function() {console.log('closed')})

##
$ node server.js 
listening
connected [object Object]

##
$ nc localhost 2020