private String siteLastUpdated() {
		String url = "http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml";
		HttpURLConnection.setFollowRedirects(false);
		HttpURLConnection con;
		long date = 0;
		try {
			con = (HttpURLConnection) new URL(url).openConnection();
			date = con.getLastModified();
		} catch (MalformedURLException e) {
			logger.log(Level.SEVERE, "Invalid URL to update from!", e);
		} catch (IOException e) {
			logger.log(Level.SEVERE,
					"Unable to obtain 'last-updated' info from URL!", e);
		}
		SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");

		return fmt.format(new Date(date));
	}