FileZilla is a free, open source FTP client. FTP stands for file transfer protocol, and allows users to transfer files over a network. There are two versions of FileZilla. The first is the Client edition and the second is the Server edition. The Server edition allows users to set up a personal FTP site. When setting up an FTP site, login credentials must be created for users. Otherwise, an anonymous account can be created for users to log in anonymously.
Open the FileZilla Server application.
Open the preferences from the "Edit" menu. Navigate to the "User Preferences".
Press "Add" under the "Users" box on the right hand side of the preferences window.
Type in "anonymous" as the username. Ensure that the password box is unchecked. Press OK. Users will now be able to log in anonymously.