An online newspaper for IT professionals, "The Register", reports that APC Smart-UPS devices are vulnerable to an attack known as "TLStorm". https://www.theregister.com/2022/03/09/tlstorm_apc_ups_critical_zero_days/ These UPS units have Internet ports, and if connected to the Internet will "call home" and report on their activity. The comments following the article generally disapprove of this "feature". Roger