Win Web Hosting

It depends on what you mean by “lock”. If we’re talking about the Linux CHMOD utillity, and setting read-write-execute permissions for owner, group, and public, then again, it depends… this time, on what software you are using for FTP. Most FTP programs will let you change the “properties” of files and folders by right-clicking and choosing the appropriate item from the pop-up menu.

Here are two good ones that are free…

Filezilla
http://filezilla-project.org/

LeechFTP
http://www.snapfiles.com/get/leechftp.html