PureFTPd is a secure, production-quality and standard-conformant FTP server. It doesn't provide useless bells and whistles, but focuses on efficiency and ease of use. It provides simple answers to common needs, plus unique useful features for personal users as well as hosting providers. Together with the Virtual User Manager it allows you to create user accounts that can access files on your ReadyNAS without having to give them a full account on the ReadyNAS. In addition it allows to lock users into chroot jails which overcomes a problem with the current ReadyNAS where FTP users can essentially see the whole file system.
ReadyNAS Platform: Intel
ReadyNAS Firmware: RAIDiator 4.2.15 or newer (may work with earlier versions but that's untested)
After installation you can access the User Manager using the quick link from the add-on's section in the "Add-Ons" -> "Installed" tab within Frontview. You will be presented with a login screen.
The default username is Administrator with a default password of netgear1.
After logging in with these credentials you can manage your virtual FTP users .
To make the PureFTPd service accessible from the Internet it is not enough to tell your router to forward incoming requests on port 2121 to the local IP address of your ReadyNAS.
In addition you also need to tell your router that all requests coming in on the ports from 50000 to 51000 should go to the ReadyNAS as well. Of you fail to do this, connections will be possible but all other actions like directory listings or file transfers will fail.