cPanel provides an easy method to prevent resource hotlinking under WordPress. However, Opalstack doesn't use cPanel. There is a method to prevent resource hotlinking though under Nginx by adding a line to the (server?) config file.
First question...does Opalstack add the line referenced in the link to the Nginx server config file for all installed apps?
Second question...if the answer is no to the the first question, then if a user wants the line added do they need to contact support? I'm not seeing a server config file when I access my account folders using SFTP under Filezilla.