That is the routing and other setting. In Australia
the providers use Uplink is via a modem and downlink
via satellite. It is not VPN or proxy based.
That's how 1-way satellite works. Because you can't send data up to the
satellite with a standard antenna / LNB, you need an uplink to make
requests to internet. Your answer to your request will arrive from the
satellite downlink. When you get an ip account with your provider, he
will provide settings for your downlink (satellite dish) and an uplink
(modem). Then your provider figures out that your modem ip corresponds
to the the satellite HUB your connected to, and sends the data back on
the corresponding sat HUB.