I've been getting repeated emails from my ISP about "exceeding my bandwidth cap" and they feel very incorrect.

My current router is a Cisco RV260, and it doesn't have a great way of tracking traffic. (There's a port traffic screen that does give tx/rx bytes, but no way to see any date ranges).

Is there anything out there that can give an accurate account of Internet traffic? It would be nice if I could see destination domain/IPs, just for kicks and giggles, but an overall traffic count is all I really need.

Thanks!