Network activity detectors, such as firewalls, communicate with one another to form a Unified Threat Management System. A first network activity detector sends a request for configuration settings to a second network activity detector. The second network activity detector sends a set of configuration settings in response to the request. The configuration settings include information for detecting digital security threats and/or for responding to detected digital security threats. In this way, configuration settings are propagated from one network activity detector to another so that network activity detectors within a UTMS system are configured consistently, e.g., have up-to-date information for detecting and/or responding to digital security threats.