nginx-proxy-manager-zh/backend/templates/ssl_passthrough_host.conf

# ------------------------------------------------------------
# SSL Passthrough hosts
# ------------------------------------------------------------

map $ssl_preread_server_name $name {
{% for host in all_passthrough_hosts %}
{% if enabled %}
  {{ host.domain_name }} ssl_passthrough_{{ host.escaped_name }}
{% endif %}
{% endfor %}
  default https_default_backend;
}

{% for host in all_passthrough_hosts %}
{% if enabled %}
upstream ssl_passthrough_{{ host.escaped_name }} {
  server {{host.forwarding_host}}:{{host.forwarding_port}};
}
{% endif %}
{% endfor %}

upstream https_default_backend {
    server 127.0.0.1:443;
}

server {
  listen 444;
{% if ipv6 -%}
  listen [::]:444;
{% else -%}
  #listen [::]:444;
{% endif %}

  proxy_pass $name;
  ssl_preread on;

  # Custom
  include /data/nginx/custom/server_ssl_passthrough[.]conf;
}