Nginx: [warn] protocol options redefined
If you get an error message “nginx: [warn] protocol options redefined” after upgrading Nginx to the latest stable version 1.24, you can easily fix it by adding “http2” to the 443 “Listen” directive in the default.conf file.
vi /etc/nginx/conf.d/default.conf
server {
listen 80 default_server;
listen [::]:80 default_server;
listen 443 default_server http2 ssl;
listen [::]:443 default_server http2 ssl;
ssl_reject_handshake on;
server_name _;
return 444;
}