Look. I can connect from my computer to your TeaSpeak server with web client. I can connect to my TeaServer with nativ client from my PC in local (inside) network.
I can not connect to my server with your web client (https://web.teaspeak.de/), and nobody can connect to my server with nativ client.
As I see, I have to check and open/forward port in my router/modem to my server. Just pls. tell me wich ports have to open and forwards in my router.