port	protocol	bind_scope	allowed_sources	purpose
8081	tcp	node-ip,loopback	nginx01,nginx02,management	application HTTP
18081	tcp	loopback-only	app-local-nginx	AI API internal upstream; never exposed by firewall
php-fpm73.sock	unix	/run/php-fpm73	nginx-local	store PHP
php-fpm74.sock	unix	/run/php-fpm74	nginx-local	AI PHP