Which WatchGuard subscription service needs to be enabled in a proxy policy to use APT Blocker?

APT Blocker is a feature designed to protect networks from advanced persistent threats by identifying and blocking malware that may not be detected by traditional antivirus solutions. This service operates within a proxy policy environment, which allows for deep inspection of web traffic.

For APT Blocker to function effectively, it relies on the capabilities of Gateway AntiVirus. Enabling Gateway AntiVirus in a proxy policy allows the Firebox to scan files being downloaded for potential malware. This is crucial because APT Blocker primarily analyzes files and attachments for hidden threats that might include zero-day vulnerabilities and other sophisticated malware typically utilized in targeted attacks.

Utilizing Gateway AntiVirus enhances the ability of APT Blocker to detect and block malicious content before it can reach end users, thereby reinforcing the network's security posture against threats.

The other services mentioned, while beneficial for overall security, do not directly support the functionality of APT Blocker in the same way. WebBlocker primarily focuses on filtering web content, Intrusion Prevention Service protects against attacks on the network level, and Application Control manages application usage. Each service has its unique purpose, but to specifically enable APT Blocker, Gateway AntiVirus is essential.