.conf

# nginx.conf
server {
  listen      443 default_server ssl;
  listen [::]:443 default_server ssl;
  ssl_certificate /etc/letsencrypt/live/domaina.de/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/domaina.de/privkey.pem;
  include snippets/ssl-params.conf;

  server_name domaina.fail;
}

server {
  listen      443 default_server ssl;
  listen [::]:443 default_server ssl;
  ssl_certificate /etc/letsencrypt/live/domainb.de/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/domainb.de/privkey.pem;
  include snippets/ssl-params.conf;

  server_name domainb.fail;
}

# snippets/ssl-params.conf
# from https://cipherli.st/
# and https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
ssl_ecdh_curve secp384r1;
ssl_session_cache shared:SSL:10m;
ssl_session_tickets off;
ssl_stapling on;
ssl_stapling_verify on;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;
# Disable preloading HSTS for now.  You can use the commented out header line that includes
# the "preload" directive if you understand the implications.
# add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;

ssl_dhparam /data/letsencrypt/certificates/dhparam.pem;