nginx: HTTP/3 (QUIC) only works for a single HTTP server

[psychofaktory]

Hi,

I tried to enable http3/quic for my HTTP servers by checking the corresponding box in the nginx configuration.
This allowed me to determine that the following entries were added to nginx.conf:

Code Select Expand

listen 443 quic reuseport;
listen [::]:443 quic reuseport;
add_header Alt-Svc 'h3=":443"; ma=86400' always;
If http3/quic is then activated for another HTTP server, all these entries are also set for that server.
However, this then leads to the following error message:

Code Select Expand

nginx: configuration file /usr/local/etc/nginx/nginx.conf test failed
nginx: [emerg] duplicate listen options for 0.0.0.0:443 in /usr/local/etc/nginx/nginx.conf

Apparently, the reuseport option can only be used once:
https://stackoverflow.com/questions/76348128/enabling-quic-http-3-on-multiple-domains-with-nginx-1-25


How can http3/quic be enabled for additional HTTP servers without causing the error?