Remote control and remote servicing are often very problematic due to restrictive policies in health care and other critical environments. This paper describes our new design of a Secure Remote Service Box, which is a tiny box that offers restricted access and robust security policies for critical environments and institutions. It allows secure remote access (for example, Team Viewer, ...) for remote control and remote servicing and blocks all other Internet traffic and connections. All devices connected to the LAN port are secured by NAT and complex filters that are natively detected and imported by Windows Network Management. The Secure Remote Service Box fulfills Cybersecurity policies for critical environments and institutions and is, of course very reliable and secure by design.