C2: Monitoring network traffic by IP address or protocol with NetFlow

·      Configure NetFlow protocol on the router to send NetFlow packets to the computer running PRTG (see corresponding knowledge base article)

·      (Purchase and) install Netflowk Collector License (also works with trial license)

·      Configure a Netflow collector in PRTG

·      Create one new NetFlow sensor for each IP or protocol to be monitored and apply a filter based on the IP or protocol for each item you want to monitor

·      Or: If you do not need long term accounting data for each PC and only want to know the current and recent traffic by IP or protocol, you can create just one NetFlow sensor and enable the Toplist feature based on IP or protocol.

·      Note: If you have several switches/routers you may not see all traffic if you only monitor one device