How does an ISP determine traffic if I using a shared internet connection?

VPN
1

How does an ISP determine traffic if I use a shared internet connection (one with a VPN and one without a VPN)?

How would the ISP determine my traffic if scenario 1, 2, and 4 or 1, 3, and 4 happens?

  1. On my physical PC, the internet connection is enabled but no browser session opened. VPN is not enabled.
  2. On my physical PC, the internet connection is enabled with a browser session is opened. VPN is not enabled.
  3. On the virtual PC (created on my PC), the internet connection is enabled with a browser session opened. VPN is enabled.
  4. Another family member’s physical PC, the internet connection is enabled with a browser session opened. VPN is not enabled.

Would the ISP detect traffic coming from the physical PC and the virtual PC?
If I disable the internet connection on the physical PC, it will be automatically disabled on the virtual PC as well.

2

I’m having a bit of trouble understanding your question. If you’re asking if your ISP can see that you have multiple devices connected, the answer is yes if you’re using your ISP’s router with their firmware. And no if you’re using your own router that’s fully under your control, unless your ISP does some deeper inspection of the traffic. They will just see that traffic is coming from the router and not how many devices are connected behind it with private IPs.

3

If you connect to the internet, ISP can see how much data is moving.

4

  1. There is no traffic so isp sees nothing

  2. There is traffic so isp sees traffic

  3. There is traffic so isp sees traffic

  4. There is traffic so isp sees traffic

Would the ISP detect traffic coming from the physical PC and the virtual PC?

Browser Page goes to ISP then to your physical Pc and then to your virtual PC so yes isp sees traffic

If I disable the internet connection on the physical PC, it will be automatically disabled on the virtual PC as well.

No it wont be disabled but as traffic is blocked on your physical PC the virtual can’t access the internet.

5

They can sometimes see protocols that vpns use, so using an obfuscated server would minimise this, also if the virtual pc is running on the physical pc then install the vpn on the physical side of the pc and it should protect both, as the virtual pc (VM) is going though the physical one first, this is my understanding anyway.

6

They can find out everyrhing if they want. Different devices has different mac addresses. Thats how the router knows which device shoud get it on the local network.

VPN traffic will begin with handshake, after that all traffic will be in ipsec tunnel. “ESP” in wireshark.

They know ypu are using vpn. Whatthey cant know is one the vpn connection is estabilished, there is no way they can look into those encrypted packets.