Ive made a simple chat Program in c#. It uses tcp. I can start the server and clients can connect and chat **if** everyone is in the same network.
I now want to put the server on my raspberry pi which has raspbian installed.
So far so good it works and i can connect again if everyone is in the same network, but now i want to access the server over the internet as a private person cant geht their hands on an public static ip adress, ive read that i could use ddns.
I have a host name on no-ip and installed noip2 on the raspberry and followed the instructions.
On their site they write you can test it with the command sudo noip2 -S. It shows that it connected with my account and will update my hostname.
In theory everything should be working, but i cannot connect to the server neither to the raspberry.
Anyone of you knows what i can do to make it work or is it the completely wrong way?

Thanks in advance!