Accessing remote Linux server via FTP as root user
I recently rented a RedHat Linux root server. I have been able to set up virtual domains (via PLESK) and I can access the server as client via FTP and shell (using PuTTy) to access the domains. I can also access the server as root through shell (using PuTTy).
But when I try to access the server as 'root' user via FTP my password (that I use to access the root account via PuTTy) is not authenticated. The root password was set up by the hosting company and I have not made any changes. I am puzzled as to why I can not access the server as 'root' via FTP i.e., why my root password is not authenticated.
I do not think it is a firewall issue as I can access the server from the same computer as a client to access the virtual domains.
Please help if I am missing anything.
Also, what is the alternative to FTP to upload files to the server root?