Xerus

Okay, it only worked once we _all_ entered this into the user.cfg. If I only did it, it still didn't work.

No, that was just a typo. I used the correct data.

They have downloaded the official most recent Windows version, i.e. 23b I have downloaded https://releases.wildfiregames.com/0ad-0.0.23b-alpha-unix-build.tar.gz and https://releases.wildfiregames.com/0ad-0.0.23b-alpha-unix-data.tar.gz and compiled and ran it as instructed on https://trac.wildfiregames.com/wiki/BuildInstructions#DebianUbuntu The text in the lobby in the right info tab is the same, yet we don't see each other and see completely different games.

I want to play with two friends who use Windows, I use Linux. Now I have compiled the new version from source, launched it and am in the Alpha 23 lobby. But they see totally different people and games in the multiplayer lobby than me, but they see each other. Are there different lobbies for the Operating systems?

Please read through to prevent questions I already answered clogging up the thread. On both PCs there is no firewall enabled, they have static ips assigned and can ping each other. The cable is obviously not an issue. Unfortunately Stans guide is very basic and doesn't include any troubleshooting. All the things he explained are obvious to me since I'm familiar with LAN gaming. I'll try the iptables command and some wiresharking. How can I test if I get "any UDP (or even TCP) connection at all"?

I would recommend hosting these online in a wiki or as google docs, to allow bookmarking and further modification, instead of having static files thrown at everyone. Apart from that you should mention that these are very basic (no troubleshooting if it doesnt work) and mainly for Windows.

Yes I joined via the exact IP. I had already tried it with a router inbetween, that didn't make any difference, and shouldn't be at all advantageous. The weirdest thing is that I couldn't even get them together via the multiplayer lobby. I am a developer myself so I am open to explore some debugging and maybe even contribute. I was searching for an alternative to AoE2 since it didn't work appropriately on Linux, found this game and thoroughly enjoyed it. However, not being able to play together obviously prevents the switch and popularization in our LAN parties.

yes they are. There is no router involved, just a single LAN cable. via ifconfig I assigned them the IPs 192.168.10.100 and 101, and tried joining the other one accordingly. As I said, I could ping the IP of the other device without any package loss. This is "ip a": 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether f4:4d:30:4c:e7:12 brd ff:ff:ff:ff:ff:ff inet 192.168.10.100/24 brd 192.168.10.255 scope global enp2s0 valid_lft forever preferred_lft forever inet6 fe80::f64d:30ff:fe4c:e712/64 scope link valid_lft forever preferred_lft forever 3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default link/ether 02:42:d5:be:9a:2b brd ff:ff:ff:ff:ff:ff inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0 valid_lft forever preferred_lft forever I achieved static ips via these commands: sudo ifconfig enp2s0 up sudo ifconfig enp2s0 inet 192.168.10.100 netmask 255.255.255.0 ar btw I use Linux Mint Cinnamon / KDE on the computers

I keep encountering the same issue as samehSM. Two linux pcs, direct LAN connection, static ips and I can ping between them, no firewall active. I have no idea what to do anymore.