The Alfresco FTP server uses UTF8 for the control encoding. FTPClient can be set to use UTF8, but VFS does not expose that (https://issues.apache.org/jira/browse/VFS-305) and needs to be modified to fix this. But that is not the issue here; FileZilla is able to automatically detect that Alfresco's FTP server is using UTF8. So apparantly the server is somehow communicating this to the client. Being able to automatically set the encoding, would greately improve the out-of-the-box quality of the FTP component.