this post was submitted on 05 Oct 2023
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If a packet is traversing an ISP's network the ISP should have to know where it is coming from and where it is going, right? So even if you "encrypt the first hello" packet, the ISP would still know where it was routed, right?
I'll freely admit I have only a very basic (and likely outdated) understanding of IP networking, but I don't see how this protects my browsing habits from my ISP. Even if they can't understand my "hello" to lemmy.ml, they still know I'm talking to lemmy.ml's IP address about something.
What am I missing?
Your ISP is mostly going to be seeing AWS, Azure, GCP, Cloudflare, etc IP addresses.
They would know you’re talking to that IP, not necessarily lemmy.ml. It is very common for multiple sites to be hosted on the same ip. The reason SNI exists is so the browser can tell the server which site it was looking for in an encrypted session. If it is 1:1 then it would be true.