I'm looking for a tool I can run on a Mac Pro to measure the monthly total of all traffic sent into my cable-modem and received from the cable-modem. Average over 5 minutes will not do it. It must count bytes for an entire month or at least give me an average over the month (week will even do. average over the day or less is right out). My intent is to have the Mac Pro share the cable modem to other computers and network devices (Tivo, AppleTV, Netflix-ROKU) in my network and have those computers summed into the total as well.
The point of this is to understand how my network-life would be impacted if the local broadband supplier started capping network access.
Is there anything like this? Does anybody have experience with this?
Thanks.
Tadd