CSF firewall blocks the ftp.

If you're having problems with iptables blocking FTP you can usually work around it by making sure that you have passive mode enabled in your FTP client. If you already have, then you probably have a bug in iptables and connection tracking in your kernel and will have to open a hole in the firewall for passive FTP connections. To do that in csf, have a look in the configuration file and search for PASV for instructions.