This Article Applies to:
TP-Link Wi-Fi Routers
 
Background:
Some customers in the community are reporting that they cannot open ports on the TP-Link router for the local Minecraft server, so their friends and family are unable to connect to the Minecraft world from the outside. This article aims to show you how to achieve that.

Solution:
We will not guide you here how to build a local Minecraft server, you need to search online or contact Minecraft for suggestions on that.

Step 1
Test the server locally. Ensure that you can access the Minecraft server successfully from another PC in the same network.

Step 2
Set a static IP address, or do Address Reservation for that gaming machine on the router.
How to configure Address Reservation on Wi-Fi Routers?
 
Step 3
Verify what kind of Minecraft service you want to share with the outside, then find out the communication port or ports for that.  Below are some ports required by Minecraft:

Step 4
Open the required port or ports on the TP-Link router as follows. Here we take port 25565 as an example, and IP 192.168.0.125 for the gaming machine for your reference:

Step 5
Find out what is the WAN IP address on the TP-Link router, and now you should be able to use that IP+25565 to access the Minecraft.

Note: Be sure the WAN IP on the router is a public one, otherwise, you will need to open the corresponding port on the modem in front of the TP-Link router. 
If you are not sure whether the WAN IP address on the TP-Link router is public or private, check this for details.