I want to measure the data usage through my router. I know this can be done using the router software but this is not an option for me. I want to connect a device between the internet aerial and the router. The device should have one ethernet input and one ethernet output.
aerial >> ethernet cable >> device >> ethernet cable >> router >> laptops, mobiles, PCs
The device should just be a throughput of the signal. I want to be able to view the data usage on the device for set time periods, e.g. last 2 hours, today, last week. Does such a device exist?