weba/14_enable_http_2_http_3.md

Enable HTTP/2 in Nginx

following adaption of the nginx site config is needed (nginx version > 1.25.1):

listen 443 ssl;
http2 on;

for older nginx-versions:

listen 443 ssl http2;

verify via browser debug console.

Enable HTTP/3 (QUIC) in Nginx

verify nginx version

Nginx supports HTTP/3 starting with version 1.25.0.

sudo nginx -v

enable http/3

# Port 443 using UDP (HTTP/3)
listen 443 quic reuseport;
listen [::]:443 quic reuseport;

# inform browser, we support HTTP/3
add_header Alt-Svc 'h3=":443"; ma=86400';

http3 on; # optional. http/3 will enabled also without this setting