@Kevin_Z 

Kevin thanks for your "standard" message but before further extenting my un satisfaction let me reply to your points:

1. I have checked and they are correct.

BTW, I am a structural Engineer whith a bit, just a bit of knowledge, so you need to explain a bit more about what you mean when you are asking what is my network topology. I have a Virgin box on modem mode, the TP link router is connected to it, i have two computers cable connected to the router and several other devices via wireless.

2. 81.98.3.165 DDNS configured.

3. there is no VPN connection. But isn't this suppose to show connected clients? and how is this supposed to show any client when i have just said that I cannot connect and I get an error message from on the client side? maybe I am missunderstanding this.

4. I have tried to connect to the VPN while all firewalls were deactivated. 

BTW, the correct path for Windows Firewall is: "Control panel->Windows Defender Firewall" but in my case, I have Bitdefender, the firewall has to be deactivated from Bitdefender and then from control panel....

Although I did that, this has not solved the problem.

Now, to further extend my unsatisfaction. Your message is far to general and innacurate in some areas. This should have been an easy and smooth process for a high-priced router. Clearly it is not. 

Do you think you can help me further with this issue so i can get it fixed?

Thanks

@Ezykiel same problem here, I'm currently setting up my VPN server but I can't connect to it outside my LAN with my laptop and my iphone. I don't know why because inside the LAN it works and same with other OpenVPN servers in my LAN like my raspberry zero w, which works also through the internet, but the archer c7 OpenVPN server doesn't.