Connect to a didecated server

Hi,
following this tutorial https://wiki.unrealengine.com/Dedicated_Server_Guide_(Windows_%26_Linux) I made a dedicated version of the game that called server game and ran on my computer, everything was correct and all of the local clients could connect to the server game but when I moved the server game to a network with custom IP/Port clients couldn’t connect to game via internet.
How can I solve this problem?