05-03-2020 06:46 AM
The whole "obscure RDP by changing the port" thing doesn't really work anymore, and hasn't for probably a decade. Will it take additional time for someone to scan your public-ip and actually discover the port, sure. Since you aren't using the default of 3389 (and hopefully nothing near that, as many scanners will include 3389+- 15 ports) then you won't get picked up by some scanning because they are only looking for the easy targets.
You will still eventually be scanned and picked up and known to be running RDP on a non-common port. It's not like a port scan is a difficult thing to do, and we have organizations that exists to scan the internet and publish all open ports. Once you open up RDP, even on non-default ports, you've opened up RDP to the outside world.
