[uunix]

Once you have networking setup on the INDY and you can at least 'ping' the windows machine. You can use an ftp server like filezilla for windows. Easy to setup and works on all Windows machines. I have this as a backup.

Alternatively, and as is my setup, NFS services running on multiple Windows Servers. I have mounted nfs shares on all my IRIX/AIX/LINUX machines and it works flawlessly. You don't even need to copy stuff from the nfs share, you can run them directly from the network. You can simply 'cd' to your mounted nfs drives and away you go. Windows implementation of nfs on server is pretty good.

Obviously though, not everyone has the ability to run a Windows Server, so filezilla (imho) is a good choice.

Security wise, all my stuff is inside my network, although I do export a public directory to the outside world, which has restrictive WAN and read/write rules, but that's a different story.