Thanks for the help.
I managed to get around the problem, turns out the ISP (or perhaps someone else) blocked Factorio's default port, changing the port solved the problem.

Is there anything I can do about it? I do not experience any other network related issues anywhere else...

I'm not sure which log you refer to so I'm attaching both factorio-current.log and factorio-previous.log.

I configured ufw to allow all communication via port 34197.

Thanks for the reply!

Hello, I have recently tried tried playing multiplayer with a friend of mine, but when I connect to his server (or any other server in the Browse public games list) I get an error saying "Server is not responding". Screenshot:
server_is_not_responding_screenshot.png


I don't know if it matters ...