What are the analogues of Ngrok?

Question

Software and Internet Services

I have a client-server project. The server is running on my PC, and so that clients can connect to me, I let all traffic through ngrok.
But ngrok has 1 big minus, as for me. The port changes every time it starts.
So I decided to ask if there are any free analogues of ngrok, where the port does not change?

Answer 1

dyndns

Answer 2

It does not matter what port the program has, it is important what the Internet listens to! And this is usually a router aka a router. The usual redirection of one - permanent port, to the "changing" port of the listening program (to the service) is enough.