# https://wiki.mozilla.org/Security/Server_Side_TLS
# https://mozilla.github.io/server-side-tls/ssl-config-generator/?server=nginx-1.14.2&openssl=1.1.1c&hsts=yes&profile=intermediate

ssl on;

ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;

# Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
ssl_dhparam /etc/ssl/dhparams.pem;

ssl_protocols TLSv1.2 TLSv1.3;
ssl_ciphers "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384";
ssl_prefer_server_ciphers off;

# HSTS (ngx_http_headers_module is required) (31557600 seconds = 1 year)
add_header Strict-Transport-Security "max-age=31557600; includeSubDomains" always;