How can I deny FTP access to a user?

Question

How can I deny FTP access to a user, or users?

Answer

cPanel will use a file located at /etc/ftpusers to block FTP access.

1. Connect to the server over SSH as the root user.
2. Use the touch command to create the file if it does not exist:

   touch /etc/ftpusers

3. Open the file with your favorite text editor. Place the usernames you wish to block access for each on a separate line and save the file:

   user1
   user2
   user3

The list of users in the file will be denied FTP access.

Additional Information

cPanel Doc: How to Deny FTP Access