Recently I wondered why my router shows a constant downstream of 5 MBit/s, while I am downloading almost no data. I discovered the "packet logging" function of my router, with which I was able to log all the traffic in the wireshark format. And I recognized that 80% of the downstream traffic was not for my IP address, so it just gets discarded (probably). When tapping the "internet interface" of my router, I could see the downstream packets of IP-adresses that is not mine: Mail addresses from other people, DNS query responses from other people, http-responses from other people...
My question: The fact that I can see other people's downstream, is this normal or is it a misconfiguration on the side of the ISP?
I doubt that it's normal, because this causes a lot of unnecessary traffic, which is bad for me, bad for the ISP and also a data privacy issue for everyone.
