The web reputation authority service provided by Reputation Enabled Defense (RED) is not supported in Fireware v12.10 and higher. For more information, go to this Partner Blog post.
Use the cloud-based WatchGuard reputation server to allow or deny access to sites based on their reputation.
The WatchGuard reputation server assigns a reputation score between 1 and 100 to every URL. When a user goes to a website, RED sends the requested web address (or URL) to the WatchGuard reputation server. The WatchGuard server responds with a reputation score for that URL. Based on the reputation score, and on locally configured thresholds, RED determines whether the Firebox should block or allow traffic.