Managing servers remotely (which is most of the time) has become a lot easier with the advent of stable, standard software such as VNC (Virtual Network Computing), which provides remote control simply and -- best of all -- for free. But there's one drawback: if the machine you're controlling should crash, you lose all contact with it. If the server is just down the corridor, that's a pain but you can live with it. If it's on the other side of the country or in another continent, it's a major headache. Until now.