COOP did not work

IW4x Client Support
1

I tried to play iw4-sp in coop mode via the command
/connect 192.168.178.30 28960
so both players were in one lobby.

For the host I see two players (Unknown Soldier).
For the client I see no player.

Then I startet the math via the host PC and the loading-screen startet for the host-PC but the client PC keeps it screen (no loading etc.).

After a while it was aborded because of time out.
Both PC’s are in the same network (at same location), so no port forwarding necessary.

Does anyone knows what I did wrong. I used the updater alterware-launcher to get to the latest versions

2

Many things could have been done incorrectly on both sides (host and other client):

Both players need to run the startPrivateListen which it appears you didn’t do.

The host needs to port forward the port 27016 (the default net_port)

Best of luck, it should be noted COOP does work fine for players that meet these requirements.

1 Like
3

You mean to run /startPrivateListen via the console (where I also put the connect command)? → because here I saw unknown command in the second window with the logging.

Forward 27016 when both are in same wifi? → How is this possible. Thought that the forwarding must be configured in the router, but when all are on the same network this it not necessary.

Ping from laptop to PC, and PC to laptop working fine.

4

I didn’t realize you were playing on the same WiFi. In that case, you do not need to port forward. You should be able to connect using the loopback address or your local IP address.

On the host go to the COOP lobby menu and select the mission then run startPrivateListen in the external console

On the client startPrivateListen; connect 127.0.0.1 27016 (make sure that the host is actually using that net_port)

You can type net_port in the external console on the host and it should print out the value

Google how to find out your local IPv4 address if the loopback address does not work

5

found the problem:

For the client (who connect) I have to click Two players (connecting from the main menu does not work).
I also found it here: IW4 Singleplayer/Spec Ops Private Match Guide
→ sry for not reading that carefully, but maybe this thread is also useful for others.

The net_port was the default net port: 28960

Thanks a lot for the quick reply