nginx-ssl.conf

ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;
ssl_prefer_server_ciphers on;
ssl_ciphers TLS13-CHACHA20-POLY1305-SHA256:TLS13-AES-256-GCM-SHA384:TLS13-AES-128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384;
ssl_dhparam /etc/nginx/ssl/dh4096.pem;
ssl_ecdh_curve secp384r1;
gzip off;
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload";
ssl_session_cache shared:SSL:50m;
ssl_session_timeout 5m;

ssl_stapling on;
ssl_stapling_verify on;
ssl_trusted_certificate /etc/nginx/ssl/ocsp.pem;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;