Related information: http://iweb.com/dedicated-server/cluster
Uploading Your Website on Windows Servers
The recommendation will be to use Remote Desktop and the file sharing connectivity available in the Remote Desktop connection options. This will allow a secure encrypted file transfer to your cluster.
On Linux Servers
We recommend using the scp command if you are on Linux or the program called WinSCP from winscp.net if you are on Windows. If you are using a Mac, you can use Fugu from the University of Michigan; this will allow a secure encrypted file transfer to your cluster.
Why Not Use FTP?
If you require an FTP access, we can unblock FTP connectivity. By default it is not enabled because it is an unsecured protocol and all the communications are in clear text, meaning that anyone who has the needed knowledge can see your password and every single file you will transfer.