Which port does Minecraft Pe use to use WiFi

Minecraft Server not working?

Many weeks ago I created several Minecraft servers.

Have port forwarding set up that each server (there are 4 but meanwhile 3 are used more) has its own port. (Have a relatively strong PC and therefore host servers for friends).

In any case, I want to create a server again today, which I did and assigned an old port that was no longer used.

I started everything ok, it worked and just a few hours later it didn't work anymore.

It just says "Connecting to server" and the console doesn't even show a login attempt.

Tried a few things, tried other ports, checked whether the port was being used, restarted the router, etc.

Does anyone have any idea what I could try?

EDIT:
Had to release the ports in the firewall on my pc then we went again