Explanation/Reference:
Block a site permanently
The Successful Company network administrator has been driven to distraction recently by a script kiddy using addresses in the 192.136.15.0/24 network to run probes of the Successful network. In this exercise, we permanently block all connections from that network.
1. From Policy Manager, select Setup > Default Threat Protection > Blocked Sites.
The Blocked Sites Configuration dialog box opens.
2. On the Blocked Sites tab, click Add.
3. The Add Site dialog box opens. 3. Use the Choose Type drop-down list to select Network IP. In the Value text box, type 192.136.15.0/ 24.
4. Click OK.
The entry appears in the Blocked Sites list. With this configuration, the Firebox blocks all packets to and from the 192.136.15.0/24 network range.
Reference: Fireware Basics, Courseware: WatchGuard System Manager 10, pages 15, 34, 59, 181