The way you portforward can depend on what type and brand of router you have so there is no straightforward answer for this question. You can either:
1. Google "how to portforward on (my router name here)"
2. Watch this video: https://www.youtube.com/watch?v=ExrSULINq9c
3. Read this guide https://www.lifewire.com/how-to-port-forward-4163829
Beyond this we cannot help you with portforwarding, you have to do this part yourself so please do not @ tech support members about it as we will only tell you to re-read this FAQ.