/etc/ftpusers file exists on your server, cPanel & WHM denies FTP access to all of the cPanel users in that file.
/etc/ftpusers file does not exist on your server, you must create it before you can use it to block FTP access.
The /etc/ftpusers file
/etc/ftpusers file lists of all of the cPanel users for whom to deny FTP access. To deny FTP access to a user, add the username to the file, with one username per line. For example, an
/etc/ftpusers file that blocks access to the
user3 users would appear similar to the following example:
- Do not include additional information in the usernames (for example, the domain name).
- To deny FTP access to an FTP user, block the cPanel account that owns that FTP user.