How can I make the node server with only accept some port?

Question

I have LAMP server now I want another server connect to my mysql with another ip address how can I do that

I don't know the keyword to search I will explain with the picture

[client] ---> [cloudflare] ---> [my LAMP]
user view with port 80              ^
                                    |
                                    |
                                port 3306
            [my another server so I can hide my real ip address of my LAMP]
                                    ^
                                    |
                                    |
                                port 3306
              [another server want to connect only mysql] 

Thanks.

Answer 1

You can use mysql proxy ( https://dev.mysql.com/downloads/mysql-proxy/ ) is a simple program that sits between your client and MySQL server(s) that can monitor, analyze or transform their communication.