(Hopefully) Quick RDP outside network question

[matt100]

I'm trying to RDP into a machine I use as a Plex server from outside my network.

It's win10 pro, I have a static IP from my ISP, RDP works fine inside my network and given the static IP Plex is also working fine remotely.

But for some reason when I try and use RDP from my android phone it connects fine on the local network but not when I move to 4G.

I get error 0x204, I've forwarded port 3389, checked the firewall (and tried turning it off to be sure) etc

Any ideas?

 

[matt100]

Is this stupidly risky? Yes I use TeamViewer normally, I just find RDP much nicer via a tablet.

Always the risk that TeamViewer stops etc I was thinking but if it's dangerous I won't bother.