server {
  listen 443 ssl;
  listen [::]:443 ssl;

  server_name www.rstat.net rstat.net;
  server_tokens off;

  http2 on;

  ssl_certificate /etc/nginx/ssl/live/www.rstat.net/fullchain.pem;
  ssl_certificate_key /etc/nginx/ssl/live/www.rstat.net/privkey.pem;

  # HSTS (ngx_http_headers_module is required) (63072000 seconds)
  add_header Strict-Transport-Security "max-age=63072000" always;

  location / {
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $http_host;

    proxy_pass http://varnish:80;
    proxy_redirect off;
  }
}

# intermediate configuration
ssl_protocols TLSv1.2 TLSv1.3;
ssl_ecdh_curve X25519:prime256v1:secp384r1;
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:DHE-RSA-CHACHA20-POLY1305;
ssl_prefer_server_ciphers off;

# see also ssl_session_ticket_key alternative to stateful session cache
ssl_session_timeout 1d;
ssl_session_cache shared:MozSSL:10m;  # about 40000 sessions

# curl https://ssl-config.mozilla.org/ffdhe2048.txt > /path/to/dhparam
ssl_dhparam /etc/nginx/ssl/dhparam.pem;

# OCSP stapling
ssl_stapling on;
ssl_stapling_verify on;

# verify chain of trust of OCSP response using Root CA and Intermediate certs
ssl_trusted_certificate /etc/nginx/ssl/live/www.rstat.net/chain.pem;

# replace with the IP address of your resolver;
# async 'resolver' is important for proper operation of OCSP stapling
resolver 67.207.67.3;