Ssl – How to configure SSL on IIS 6.0 FTP Server

If you need to do it at the server level then you will have to create another site and have it forward the the https site.

If you can edit the code, you can not enforce ssl at the server level, instead you can do it in your website by detecting if the url starts with http: and redirecting to the same url with https: instead.

You don't. rsync can't do that for you, it is a protocol of its own and doesn't work over FTP.

You might, however, want to try csync. IIRC it provides rsync-like behaviour over HTTP. I can't comment on whether it works over FTP, you'll have to try it.