Interfaces > IPv4 Upstream Gateway
What does the IPv4 Upstream Gateway do? Is this where your upload connection goes to?
The gateway on an interface configuration page does a couple things:
1. Tells pfSense to treat that interface as a WAN
2. Defines were traffic exiting that interface should go (usually a WAN/ISP gateway address)
If the interface is a WAN/Remote connection, it would be your next hop, typically an ISP address, CPE, upstream router, etc.
For local/LAN type connections there would be no gateway specified on the interface.