In your FTP client of choice, you will need 4 items to log in (host, username, and password). Use the following items to log in:
1) Host: YOURDOMAIN.com *Note: you can also use "ftp.YOURDOMAIN.com" which will use port 21 as the default. You can also use the IP address of your server.
2) Username: Your cPanel user
3) Password: The password for your cPanel user
4) Port: 21 *Note: port 21 is the default port for FTP.
5) Click connect
How to connect via FTP using a created account:
1) Host: YOURDOMAIN.com
2) Username: ACCOUNT@YOURDOMAIN.com
3) Password: The password you created for this account
4) Port: 21
5) Click connect