Do you have to use RDP or can you use something like Teamviewer instead? What router do you have? Do you have any third-party firewall software on the PC you are connecting to?
I wondered if you might have an option to whitelist somehow, alternatively what I do when using RDP is to VPN in to the router and then RDP across the LAN so the RDP port isn't exposed to the WAN but this requires a router that is a VPN server.
Look to see if the hub firewall can block all attempts on that port by default then whitelist your works IP and any others you need access from - or sign up for a vpn somewhere with static ip which you can whitelist then use to access from anywhere. If it can't then put it in modem mode and use a standalone router
Just the fact that some geniuses were laughed at does not imply that all who are laughed at are geniuses. They laughed at Columbus, they laughed at Fulton, they laughed at the Wright brothers. But they also laughed at Bozo the Clown.