You can share the logs related to the MM attempt here. If someone else with more expertise has an idea, they may be able to tell us.

Yesterday i joined a 4v4 game in custom games instantly no issues, so today i tried matchmaking again but was unable to even establish any connection to 1 person as you can see in the debugger which only shows 6 out of 7 players. This time i was using the VPN btw.

Is there anything you can get out of this information perhaps?

You cannot see which country the other player is from on the matchmaker screen, but you can see it in a custom lobby.

Thats unfortunate but i'll put some more effort into playing with the network settings. I will also try to reinstall everything because im unsure what the settings are right now, maybe i made it worse... and you're right, those are all server based games so i suspect the issue is indeed in the p2p traffic as in some cases i can start without any issues. There must be a common denominator.

Is there a way to see what countries i'm connecting to if I play via matchmaking?

Do you perhaps have a suggestion for a country to set the VPN to? It takes time to even find a match so i can only try so many vpn locations in an evening.

I am not sure where the issue could potentially come from. You mentioned that other games work without any problems, and if FAF would cause network issues (which would be an explanation if everything on your side is functioning correctly), then I would expect to see a clearer pattern.

It could be that the other games you play are all server-based, and you only encounter issues with SC because it uses a p2p architecture, and somehow that causes issues.

There are some additional steps you might try to narrow it down:

• Check whether your router or any security software interferes with p2p traffic. Some might block those connections attempts, because they see it as potential malicious. Simply adding SC to an exclusion list, might be not enough for p2p related traffic.
• Test it with another network, e.g. a mobile hotspot or the internet network of a friend.
• You could also test with IPv4 only and then with IPv6 only.

I don't know about the nationalities tbh, how can I check? I play via the matchmaking, not custom games.

Usually during the loading when you see that screen with the squares indicating connection, one square doesn't even show up. Others are commonly green, some yellow. And rarely a games doesn't start even though al squares are visible, but obviously not all green. When a game does start its often very quickly, like just 10 seconds. And sometimes its waiting for one yellow square for 20 seconds or so and then finally connects/starts.

Generally games go without issue for me when started. I had some other people disconnect in 3v3 or 4v4 matches but I always stayed connected.

Also turned off my routers firewall and turned on ping via WAN but no difference. During this test I had everything turned back to normal as there was no effect.

What is your OS?
Windows 11 x64

What is your security software?
Windows protector and firewall, set exceptions in both for FAFclient and supcomfa

What is your network environment?
Not sure what you mean by this? Im on a wired network in my home on a TP link router. Speedtest is 150mbs, stable with low ping/latency. No issues with other online games

What country are you from?
Netherlands

Context: unpacked .zip:
client.log
game_26023673.log
ice-adapter.log