Click on the FTP session controls link in the FTP Menu area.
All active FTP sessions (FTP connections that are actively uploading or
downloading files) are listed. Click on the 
button
next to a session to terminate that session.
You can view and terminate FTP sessions using the provided FTP session controls. This is useful for general information and stopping unwanted FTP activity.
To control FTP sessions:
Click on the FTP session controls link in the FTP Menu area.
All active FTP sessions (FTP connections that are actively uploading or
downloading files) are listed. Click on the button
next to a session to terminate that session.