How do I connect to a server that has an "internal" ip using an external ip?

Question

Network administration

Hello.
I ran into this problem: running a game server on Linux, I can connect to it using the internal IP (example: 192.168.1.94:7777), people can connect using the external IP (example: 188.99.88.77:7777).
But how can I connect externally? How to do it ?
At me, it is banal, this server does not find. Plus, my bot needs to connect to the external IP for everything to work correctly, if it connects to the internal IP - it doesn't work quite right!
By the way, if I enter an external IP in the address bar, then my router settings open!

Answer 1

Write down the connection diagram, write which IP is gray or white. well, "since people can connect using an external IP" then why are you "worse" than these people or where are you going to connect from?