Can firmware upgrades be performed over a remote network (e.g. over the Internet)?
Not normally, no. The reason is because NetEdit must be able to see the Host Ethernet device in his list. The list is compiled by NetEdit sending out a broadcast and having all the Host Ethernet devices respond. Since the Internet will block all broadcasting, then the list will always be blank. However, it is possible to configure a VPN (Virtual Private Network) between the locations and configure the VPN in such a way as to allow broadcasting.