My monthly report came up before while I was using Norton 360. According to the report Norton blocked 3 Network Threats. Clicking on it sends me to the Security History page but shows nothing related to 'Network Threats'. I've tried looking on Firewall-Network and Connections history but that only shows information from today and that's it. (so offers no insight).
What could these Network Threats be? My router is secured by a password and Norton Firewall is enabled. Is this anything serious?