The following Ports are used by VD v4.5 to download an application via TCP/IP:
21 FTP
6001 Programming port
6002 Programming port
8000 Used for data sharing and Web Gate
13777 Alternative to port 21

Note: Not all Magelis terminals use all of these ports. However VD will try to establish a connection with all of them.
If the terminal does not use one or more of these ports then the connection will be ignored.