ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ecdh_curve brainpoolP512r1:sect571r1:secp521r1:secp384r1;
ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-CHACHA20-POLY1305-D:ECDHE-RSA-CHACHA20-POLY1305-D:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-RSA-AES128-SHA256';
ssl_prefer_server_ciphers on;

ssl_session_cache shared:SSL:20m;
ssl_session_timeout 15m;
ssl_session_tickets off;