Communication device, non-transitory computer-readable recording medium storing computer-readable instructions for communication device, and method executed by communication device

Abstract

A communication device may comprise a controller, wherein the controller may be configured to: receive alert information from a security monitoring device different from the communication device, the alert information indicating that an attack on an intranet to which the communication device belongs was detected; and in a case where the alert information is received from the security monitoring device, execute a security process for increasing security of the communication device. The security process may include at least one of: a process of shifting an operation mode of the communication device from a normal mode to a prohibition mode, the normal mode allowing receipt through inbound communication, and the prohibition mode prohibiting the receipt through the inbound communication; a process of deleting data in a memory of the communication device; and a process of encrypting data in the memory of the communication device.