Re:Shutting down our unencrypted public DNS service
by TurningCanadian on Tuesday December 13, 2022 @12:00PM
(#33971675)
There's still TLS Server Name Indication leaking the hostname.
Re:Shutting down our unencrypted public DNS service
by manigandham on Tuesday December 13, 2022 @12:13PM
(#33971924)
SNI can be encrypted in an extension of TLS 1.3 called ESNI (encrypted server name indication). With both EDNS and ESNI, there's sufficient privacy coverage.
The next standard is ECH (encrypted client-hello) which secures the entire handshake: https://blog.cloudflare.com/encrypted-client-hello/
Re:Shutting down our unencrypted public DNS service
by gsich on Tuesday December 13, 2022 @02:33PM
(#33974473)
Is it still in draft state?
Re:Shutting down our unencrypted public DNS service
by manigandham on Tuesday December 13, 2022 @03:10PM
(#33974999)
If the source device then connects to whatever IP was in the answer, and you have that IP mapped, then you can reveal what they might be connecting to, but that requires more data and processing compared to plaintext DNS and still won't reveal the actual encrypted traffic.
With shared IPs from CDNs, hosting providers, and VPNs, it provides far more obfuscation for the average user.