QNAP QTS 5.0.0.1932
A QNAP NAS can have Multiple Virtual Server running on same IP and Port. Different Port can also given. Open 'Web Server' from Control Panel. Your 'Web Server' must be enabled and running as shown below.
Click 'Virtual Host' tab and click 'Enable Virtual Host', then click 'Create a Virtual Host'.
Give the 'Host Name' as 'TestSite1' (No Quotes).
Select 'Root Directory' as your Install Folder. Create 'TestSite1' Folder manually in File System before choosing the folder in 'Root Directory'.
Choose 'Protocol' HTTP and 'Port Number' 80. Click 'APPLY'.
Download Word-Press Zip - https://wordpress.org/wordpress-4.9.5.zip
Unzip the Download. Copy all unzipped files and paste into 'TestSite1' Folder.
Create a different database for 'TestSite1' as TestSite1' if you want a separate database for each virtual server, otherwise skip this step.
Run the Word-Press URL in Browser - http://NAS-IP/TestSite1 to complete the Word-Press installation. Provide the Database Name, Root User Name, Root Password for Database, Host and Prefix etc. Finish the Installation and access login url by - http://NAS-IP/TestSite1/wp-login.php
