Using post names as permalinks, I should clarify the wordpress server is using apache and the reverse proxy server is using nginx, a2enmod rewrite is enabled on the wordpress server. I’m not too sure on PHP interfacing with Apache, runnning php php-curl php-gd php-mbstring php-xml php-xmlrpc php-soap php-intl php-zip php-mysql, I haven’t modified any PHP configs from default, see apache config + nginx reverse proxy config in pastebin: https://pastebin.com/ASTdxPgu