Can't connect to friend (or him to me) v0.15.4

[Verminlord]

Hi, just reinstalled this game again after a while, and my friend got it for the first time. We have tried to join games hosted on the public server list by each other but always get the "cannot establish connection" thing. Joining a random game on the public server list works though.

[nevniv]

Are you forwarding ports in your router? I have to do that for my headless server, I would assume it is the same for what you are trying to do.

[Jon8RFC]

Indeed, forward UDP port 34197 and give it another try.