You'll find most or all ftp commands worth perfectly through this module.
Where can I get this module?
Is it free?
Is there a site that I can download it from?
http://www.devshed.com/Talk/Forums/cool.gif
luciddream already told you but not specific enough. You need to get the libnet package from http://www.perl.com/CPAN-local/modules/by-module/Net/libnet-1.0703.tar.gz