Steam do not find sessions or pretty much anything.

Hello guys,

So I’ve been wrapping my head around Steam multiplayer for the last few days, but nothing I did worked !
Here’s what I came up with. Really nothing fancy, All this does is checking if a session is found, joining it if there is one or create one if there is not. The Boolean isLAN is set by another button, to true or false, depending on the user’s preferences. (Just a preview image here, for full size, click on the link down the post)

So, here are my multiples problems.
I tried to run this code with a Null online subsystem. worked great for LAN plays, but only on my PC. When I tried to package the game, put it on another PC of mine on the same network, no sessions were found. This wasn’t my main goal, anyway, but it does surprise me.

The real problem is when it comes to Steam play. I set up Steam and it works. When I launch the game in standalone, I see my overlay. But once again, on two different PCs, with two different Steam accounts, I can’t find any sessions, despite the max results set to 100.000 !

I’ve been through a lot of other topics, but none of them helped me… Do you have any idea why this might happen ?

Edited : Here is the config lines I added to my DefaultEngine.ini to get Steam working :

112718-config.png

Ports, it’s always the ports…

Do you suggest that I must open the 27015 port to let Steam work ?