@skalders 

Here is a guide we have on setting up OpenVPN: https://www.tp-link.com/us/support/faq/1544/

During the setup, the VPN local IP will be referenced. The DDNS is used so you do not need to track the public IP.

When testing on the PC, is that connected to the Wi-Fi of the TP-Link router? If so, enable the mobile hotspots on your cell phone, then connect your computer to that and test the OpenVPN connection.

@Tony 

Hi Tony, thanks for the reaction. I can connect to openVPN by now, but cannot RDP or even ping any device from an external PC. I made a new topic for this:

https://community.tp-link.com/en/home/forum/topic/214426?

@skalders 

The forum that has /en/ is actually our global forum, which is fine. Someone else should follow up with you.