Checking server connections

multiserver.js

var http = require('http');
function handler(req, res) {
	res.writeHead(200, {'Content-Type': 'text/plain'});
	res.end('Hello world\n');
}

http.createServer(handler).listen(3000, '127.0.0.1');
http.createServer(handler).listen(3001, 'localhost');
http.createServer(handler).listen(3002, '127.0.0.1');		// ifconfig
http.createServer(handler).listen(3003, 'host.example.com');	// echo $HOSTNAME
http.createServer(handler).listen(3004, 'LocalHostName.local');	// scutil --get LocalHostName


// $ node multiserver.js