. The Watch Guard APT Blocker is a new service available for all Watch Guard Unified Threat Management (UTM) & Next-Gen Firewall platforms. This Watch Guard APT Blocker 1-Year subscription for the Watch Guard Firebox M200 is one of the industry's most sophisticated platforms for detecting advanced persistent threats & zero day evasive malware. Advanced malware now threatens every network. Even yours Zero-day attacks & malicious programs once targeted only the largest networks. Not any more. They're taking aim at networks of all sizes. The likelihood yours will be attacked grows every day..