Development of a client-server communication system similar to Teamviewer-a?

Question

client-server

Actually, the question is how to develop a client-server communication system similar to Teamviewer-a:
- the client connects to the "global" server and registers receiving an identifier
- the client program connects to the "global" server by providing that identifier
- after which a tunnel is created for communication between the client and server.
If there are other suggestions for this kind of communication protocol I will be happy to discuss.

Answer 1

Something like this:
Write technical specifications
Draw the architecture
Programming Launch the Profit
global server .