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Say (an encrypted) hello to a more private internet | The Mozilla Blog
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this post was submitted on 06 Oct 2023
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privacy
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For the most part yeah, but with limited IPv4, there can be multiple servers that share the same IP separated under a NAT. Definitely don't assume you're anonymous though. If it was IPv6 then it'd be 1:1 map to a specific domain.
I'm not sure this is (always) true.
I might rent a VPN, and that VPN may have an IPv6. But I could host a dozen services on it, behind a reverse proxy, and there would still only be one IP.
I think you misunderstand. I'm not talking about a single server hosting multiple servers. I'm talking about like your whole neighborhood could share the same ipv4 address by your ISP because of NAT. Proxies have nothing to do with NATs.
You should specify that you mean CGNAT, which is different from regular NAT and works at the WAN level.
Also, your ISP does the routing and translation for CGNAT, so they can still see exactly what everyone is doing (by necessity - they need to route your packets!)
So this helps even in the case of CGNAT, and they will only know the destination IP of your traffic.
But in this case, the ISP already knows who you are within the CG-NAT because they run it. I'm confused as to how this is relevant to a comment about servers sharing an IP address.
Because the other server doesn't...
The new protocol discussed in this post is about privacy in transit, not about protecting yourself from the server you are connecting to, so I got very confused.