server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;

{% if proxy_protocol %}
    # Alternate Port for PROXY PROTOCOL incoming connections
    listen 10443 ssl http2 proxy_protocol;
    listen [::]:10443 ssl http2 proxy_protocol;

    # RealIP rewrite authorized for connection from reverse-proxy
    set_real_ip_from {{ hostvars | ip_from_inventory('vm_gateway') }};
    real_ip_header proxy_protocol;
{% endif %}

    # Do not advertise nginx version number
    server_tokens off;

    # Certificates location from CertBot
    ssl_certificate /etc/letsencrypt/live/{{ server_fqdn }}/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/{{ server_fqdn }}/privkey.pem;

    # TLS Mozilla Guideline v5.4,
    # nginx 1.14.2, OpenSSL 1.1.1d, modern configuration
    ssl_session_timeout 1d;
    ssl_session_cache shared:MozSSL:10m;
    ssl_session_tickets off;
    # modern configuration
    ssl_protocols TLSv1.3;
    ssl_prefer_server_ciphers off;
    # HSTS (2 years, no preloading)
    add_header Strict-Transport-Security "max-age=63072000" always;
    # 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/letsencrypt/live/{{ server_fqdn }}/chain.pem;

    # Include custom locations
    include     /etc/nginx/locations/{{ server_fqdn }}/*.conf;
}