alt Hacker NewsNginx mainline 1.29.x supports it. So once you get that and also the openssl version on your system, good to go. Likely too late for ubuntu 26.04, maybe in debian 14 next year, or of course rolling release distros / containers.
But, in a personal/single website server, ech does not really add privacy, adversaries can still observe the IP metadata and compare what's hosted there. The real benefits are on huge cloud hosting platforms.
FWIW Nginx 1.30 [1] just released and supports it so most distributions will have support as soon as those responsible for builds and testing builds push it forward.
"Nginx 1.30 incorporates all of the changes from the Nginx 1.29.x mainline branch to provide a lot of new functionality like Multipath TCP (MPTCP)."
"Nginx 1.30 also adds HTTP/2 to backend and Encrypted Client Hello (ECH), sticky sessions support for upstreams, and the default proxy HTTP version being set to HTTP/1.1 with Keep-Alive enabled."
But, in a personal/single website server, ech does not really add privacy, adversaries can still observe the IP metadata and compare what's hosted there
I don't quite follow. I have dozens of throw-away silly hobby domains. I can use any of them as the outer-SNI. How is someone observing the traffic going to know the inner-SNI domain unless someone builds a massive database of all known inner+outer combinations which can be changed on a whim? ECH requires DOH so unless the ISP has tricked the user into using their DOH end-point they can't see the HTTPS resource record.
[1] - https://news.ycombinator.com/item?id=47770007