I've tested connecting to the FTP service from local network and that works fine.
How ever I've used this tool: https://ftptest.net/
To try and connect to home my server and no luck.
which I assume I would use my external internet Ip address and port 21.
Are these settings on my router correct?
Omv settings: https://i.imgur.com/fwLgk8p.png
(192.168.0.23 being my openmediavault server where the ftp service is).