So if my router’s packets are sent through the ISPs routers, then isn’t the source IP of that packet changed when it gets modified by ISP’s NAT? Shouldn’t that mean Google sees the source IP of that packet as the same as the last router’s IP? How does it know my personal router’s public IP?
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Because your ISP doesnt run NAT. Your routers public IP is directly exposed to the internet. Your router runs NAT for your internal network.
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