title: reCAPTCHA in a local network machine
body: <p>How can I use Google's reCAPTCHA in a test server on a local network?</p>
  
  <p>According to the <a href="https://developers.google.com/recaptcha/docs/start" rel="noreferrer">documentation</a>:</p>
  
  <blockquote>
    <p>By default, all keys work on "localhost" (or "127.0.0.1"), so you can always develop and test on your local machine.</p>
  </blockquote>
  
  <p>My virtual machines however are located on non-localhost local IPs (192.168.XXX.XXX), and adding "localhost" or "127.0.0.1" does not seem to work (the captcha displays an invalid domain error). Is there any way around this?</p>