The document on V-Connect is under FAQ section
SBXFAQ200803-12a

Esstentially you need to open the following ports on the customers firewall
5103 TCP/UDP (PC Admin KSU programming)
23 TCP/UDP (PC Admin remote diagnostics and trace)
5002 TCp/UDP & 9777 TCP/UDP (PC Admin Upload/Download & Sofware Upgrade)
Note they are separate ports and not ranges

This is using port forwarding, so you will need to know the customers public facing I.P address