Espruino has no Internet Connection on Linux/Raspberry

My dear Espruino users,

I have 2 Espruinos to monitor some temperatures and to set some relays for home automation. One wire communication for temperature sensors works like a charm. Thanks for all the great work!

Unlikely I have one issue I can't sort out (and maybe I'm not the only one out here). I have connected the Espruino to my Raspberry Pi (as well as my ubuntu notebook before) and wanted to build a small webserver which outputs the sensor data as json object.
As stated out in http://www.espruino.com/Internet the Espruino should have Internet on Linux (and Raspberry) out of the box.

I used standard http server module:

var http = require("http");
http.get("http://www.espruino.com", function(res) {
  res.on('data', function(data) {
    console.log(data);
  });
});

but Espruino is telling me it has no internet connection. USB connection from Raspberry to Espruino is working > I'm able to set LED's and send Scripts via minicom to Espruino.

I'm thankful for any advice.

Dear Jack

P.S. Raspberry itself has of course a working internet connection ;-) Just to be sure.