Factorio Forums

Hi,
we bought this game just to play together.
We opened the ports using PortMapper as explained.
And we closed the firewalls of both our routers and windows.
Now when we try to connect open games, we can connect.
And when I host a game, my brother can connect.
But when he host a game I cannot connect to his game.
I attached the log file.
Please help us, we have been trying to solve the problem for a week.

And this is the log file of my brother. He cannot host a game. We think that He opened the port

I mean when I try to connect my brothers' game at first for a second it looks like it downloads the map but then the transfer speed decreases to 0 and stays there.

At least is there a way to understand whether we opened the port or not?

Since you're playing on the 0.17 steam version you don't need to forward any ports. All you have to do is check the "Steam" option when hosting the multiplayer game and can then join it via steam invite.

If you get to map downloading then it's working. If it fails to download then the connection between the 2 computers was unstable/dropped.