lilik_playbook/roles/nginx/templates/base.j2

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

{% if nginx_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 %}

    server_name {{ nginx_site_fqdn }} {{ nginx_site_alternate_fqdns | join(' ') }};

    # Do not advertise nginx version number
    server_tokens off;

    # Certificates location from CertBot
    ssl_certificate /etc/letsencrypt/live/{{ nginx_site_fqdn }}/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/{{ nginx_site_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 {{ 'TLSv1.2' if nginx_tls_1_2 }};
    {% if nginx_tls_1_2 %}
    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;
    {% endif %}
    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/{{ nginx_site_fqdn }}/chain.pem;

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