Plesk and Anonymous FTP

[pleskuser201509]

Hello,

I'm using Plesk 12.5.30 to administrate an ‪Ubuntu 12.04.5 LTS‬. I'd like to use this same server to share files using an anonymous FTP access (reachable with an URL such as "ftp://files.mydomain.org/ftp/folder/path"

I googled to find a solution and it seems that I can't do it using Plesk if I don't have a dedicated IP adress for the server. But I have about 15 websites on the server and the server's IP is shared... and I would realy like to use this server to share files...

So my question is : What's the best way setup an anonymous FTP access to a folder using this server ? Can't I really do it using Plesk ? Can I use proftpd (as Plesk seems to use a custom version of proftpd) ? Is there another way to do it ?

Thanks in advance for your answers ,