Yes, port forwarding can work under 4G connection, but the WAN IP address obtained from sim card provider should be a public one, otherwise port forwarding will fail to be configured,

@daveboulter 

Model: TL-MR6400

Hardware Version: V5

Firmware Version: 1.3.0 0.9.1 v0001.0 Build 201207 Rel.56223n

So i have the tplink mr6400 v5 4g i configured a  windows server 2008 r2 webserver port 80 Internet Information services  & remote desktop connection port 3389 doesnt work over internet external  public ip address then internal private  ipaddress only private ip work single ip address LAN working i cannot access anywhere over internet pubic ip adress

Normally i would access my pc from outside my house with my modem.

Now i wanna setup remote desktop connection and it doesn't work.

I used the right external and internal port for remote desktop (3389) and the ip of the pc i wanted to access.

But when i wanna acces it with my ip form my isp it cant connect to it.

It does work locally when I type the external public  IP address from the tplink mr6400 4g router  currently firmware v5 

If i check it of the port is open, i see its closed on overy ip adress that . https://gyazo.com/d66aec2b7541a238c55c75a9402aa7c3

This is my setup; the tplink mr6400 v5  4g router is connected to my modem and from  tplink mr6400 v5 Ethernet  connected to my windows server 2008 R2

 

 

Please help Me!!!!