ProFTP Passive mode FTP slow Plesk

Connecting to a ProFTP server in Passive mode wouldn’t work, or was very very slow. This happened on a Plesk box.

Open /etc/proftpd.conf and scroll to the bottom, add this setting:

PassivePorts 60000 60019

Restart proftpd, or xinetd just to be safe:

/etc/init.d/xinetd restart