A security appliance includes: a network port enabling direct connection to a gateway; a storage module having stored thereon firmware for operating the security appliance; and a processor that executes the program code of the firmware. The firmware configures the appliance to: establish a seamless communication interface with a connected gateway; monitor traffic coming into and going out from the connected gateway; and identify traffic anomalies within the monitored traffic. The firmware further configures the appliance to: in response to identifying one or more of the traffic anomalies: forward information about the identified traffic anomalies to a centralized database for evaluation and reporting; and initiate steps to prevent further occurrence of the traffic anomalies, without user approval.