FTP "host header" to pool

I don't think FTP has any kind of headers. The actual data in the network streams don't include the host it's connecting to anywhere (as far as I can determine). I'm not sure if there's anything in the connection that you could use to determine which hostname was used, as I believe FTP just resolves the hostname to an IP and uses that to connect.

 

 

You'd probably have to have different virtual servers (different IPs), or use different ports for each.