FTP Host/Login/PW

I’d like to use FileZilla to access my wordpress site.

I am not sure if my company firewall is blocking it, but is my FTP account/password the same as my WPM-MU admin login?

Is FTP blocked for the basic 1st month membership? I am trying to troubleshoot. What is the host name? (e.g. http://ftp.sitename.com or http://www.sitename.com)