Port Forwarding Issue While Performing MsFVenom Over WAN

Hi,

So I've been trying to use Meterpreter over WAN but unfortunately I am dead stuck at Port Forwarding. Ive read many port forwarding tutorials but no help.

When I log into my router, under the application menu, clicking on "Advanced NAT", I get the option "Virtual Server Configuration" which I believe is port forwarding. Am i right?

Here's what it looks like:

So what I've filled is:

Same interface (Thats the only option)

Enabled Customize (Default)

Protocol: TCP/UDP

Source IP address: Empty

Start Port No: 4444

End port no: 4444

Internal host: 192.168.1.2 (my local ip)

Mapping name: Meter preter

Now the issue is, when I'm checking online if port is open or not, I get the same result. "Port is closed". Ive tried many websites but well, same result. Here's what it looks like:

I'm really stuck on this one, please help me out!

Thanks in advance