When encountering bandwidth shortage (Internet access speed is getting slower), you may want to check the bandwidth usage by IP or service for determining the solution. This article describes the way for you how to do the deep analysis for the traffic on your firewall. Before go through this article, you may require to start Data Collection at Log | Report page and also enable the option of AppFlow to Local Collector at AppFlow |Flow Reporting |Settings page.
NOTE: For function AppFlow Monitor, you are required to check whether you have the license (App Visualization).