private static List<NetworkInterface> getAllNetworkInterfaces() {
      Enumeration<NetworkInterface> networkInterfaces;
      try {
         networkInterfaces = NetworkInterface.getNetworkInterfaces();

         List<NetworkInterface> ifaces = new ArrayList<>();
         while (networkInterfaces.hasMoreElements()) {
            ifaces.add(networkInterfaces.nextElement());
         }
         return ifaces;
      }
      catch (SocketException e) {
         return Collections.emptyList();
      }
   }