The AVM Fritzbox does not offer monitoring capability though SNMP or other standard monitoring technologies. Can I monitor the bandwidth usage of the DSL, ADSL or VDSL Internet connection using PRTG?
Important note:
The AVM FRITZ!Box WAN Interface sensor is deprecated as of PRTG version 16.1.23.
Please see the following article for more details and possible alternatives:
As an alternative, the only way to monitor your FritzBox is by using the sensors from PRTG Tools Family with out native EXE/Script Advanced sensors.
Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.