How to set passive FTP port range from Plesk interface?
Go to Home > Tools & Settings > FTP Settings and set set passive FTP port range:
Such functionality is yet to be implemented in Plesk for Linux. Please take part in our product improvement by referring to the following link: https://plesk.uservoice.com/forums/184549-feature-suggestions.
The top-ranked suggestions are likely to be included in the next versions of Plesk.
As a workaround use the following guide:
Enabling Passive FTP (Linux)