limit ftp access from server

[DavidN]

In my security policy, I have selected "Allow only secure FTPS connections". Since I use SFTP for server access, I would like to limit FTPS to just Plesk usage.

I would like to disable FTP completely. In /etc/proftpd.conf I find Port 21. Is it as simple as just commenting that line?

Does SFTP allow anonymous login? If so should I / how can I disable that?

My firewall settings have (the default) FTP server - allow incoming from all. Should I replace that with a more restrictive setting?