I have this bizarre problem trying to connect to my client’s ftp server from my workstation. I can’t! But I can shell into my linux server and ftp to the client server just fine. I wonder if it has anything to do with this bug:
Operating system problem detected!
A bug in Windows causes problems with FileZilla
The bug occurs if you have
-Windows Server 2003 or XP 64
-Windows Firewall enabled
-Application Layer Gateway service enabled
See http://support.microsoft.com/kb/931130 for background information.
Unless you either disable Windows Firewall or the Application Gateway service, Filezilla will timeout on big transfers.
Update: See also http://support.microsoft.com/kb/912949