Re:Wikimedia DNS
by acdha on Thursday September 07, 2023 @07:13AM
(#37417274)
> At the ISP level, does it really matter that they can sniff my queries/SNI? They're just as capable of seeing the IP4/6 I'm connecting to and rDNSing that to know the hostname.
Shared hosting breaks that. If I connect to an IP used by AWS, Akamai, Fastly, etc. there are literally millions of things I could be using but the SNI header will tell them which one.
As a practical example, if a school administrator in Texas sees a connection to 104.16.12.208 they only know that someone is connecting to one of the millions of sites behind Cloudflare. SNI tells them it’s Planned Parenthood and they can call the police to report an offense against the church.
Shared hosting breaks that. If I connect to an IP used by AWS, Akamai, Fastly, etc. there are literally millions of things I could be using but the SNI header will tell them which one.
As a practical example, if a school administrator in Texas sees a connection to 104.16.12.208 they only know that someone is connecting to one of the millions of sites behind Cloudflare. SNI tells them it’s Planned Parenthood and they can call the police to report an offense against the church.