Can't host a server using Steam. "SteamSockets: binding to port 7777 failed"

Development Platform & Builds
, , , , , ,
1

Hello.

My game works well without the Steam API, I can host a game with open map?listen and join over a network with open ip however I can’t seem to get it working with the Steam API.

I’m pretty sure it’s going wrong here, when I type open map?listen:

[2014.07.18-13.01.38:486][340]LogInit: SteamSockets: Socket queue 131072 / 131072
[2014.07.18-13.01.38:487][340]LogNet:Warning: Network Failure: GameNetDriver[NetDriverListenFailure]: SteamSockets: binding to port 7777 

failed (0)
[2014.07.18-13.01.38:487][340]LogNet: NetworkFailure: NetDriverListenFailure, Error: 'SteamSockets: binding to port 7777 failed (0)'
[2014.07.18-13.01.38:487][340]LogNet: DestroyNamedNetDriver IpNetDriver_0 [GameNetDriver]
[2014.07.18-13.01.38:487][340]LogExit: GameNetDriver IpNetDriver_0 shut down
[2014.07.18-13.01.38:487][340]LogWorld: Failed to listen: SteamSockets: binding to port 7777 failed (0)
[2014.07.18-13.01.38:488][340]LogNet:Error: LoadMap: failed to Listen(/Game/Maps/Dev?listen)

I forwarded the 7777 port but it still doesn’t work.

Larger log attached, any help would be appreciated!

[log.txt][1]

10589-log.txt (15.3 KB)

2

Hi Acren,

Let’s make sure the basics are covered - double-check that everything is set up according the [Steam online subsystem documentation][1]. From the log it looks like the game is trying to use the generic IP net driver instead of the Steam net driver, which means it may not be configured correctly in your DefaultEngine.ini file. The above documentation link has an example of how to set this up.

Online Subsystem Steam Interface in Unreal Engine | Unreal Engine 5.1 Documentation

3

Hi Ryan.

Yes, I have the DLLs installed in Engine/Binaries.

I have the v130 sdk, but I have to rename the folder to Steamv129a instead as it will complain LogOnline:Warning: STEAM: Steam DLLs not present or failed to load! otherwise.

With the folder name as Steamv129a, the editor log says LogOnline:Warning: STEAM: Steam API disabled!, which apparently is to be expected as the Steam Online Subsystem doesn’t activate in the editor.

I also have the following in my DefaultEngine.ini.

[Engine.GameEngine]
+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="OnlineSubsystem.IpNetDriver")
 
[OnlineSubsystem]
DefaultPlatformService=Steam
 
[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=480
 
[OnlineSubsystemSteam.SteamNetDriver]
NetConnectionClassName="OnlineSubsystemSteam.SteamNetConnection"

I also loaded the module in the build file.

Is there anything else required?
Thanks.

Also worth noting that the game DOES show the overlay and tell all my friends that I am playing Spacewar.

4

Hi Acren,

As far as I know, we haven’t tested with other versions of the Steam SDK. It’s worth trying the actual v129a SDK, if possible.

If you are seeing the “Steam API disabled!” message in the same run when you try to open the listen server, try running the server from a non-editor build.

5

Thanks for the suggestion, I tried the v129a SDK but it yielded the same results as the v130.

The “Steam API disabled” only happens in the editor, but trying with standalone or packaged game results in the “SteamSockets: binding to port 7777 failed” as mentioned in the OP.

6

Ok, it looks like the documentation I linked to in my previous answer is incorrect as of this posting - sorry about that, I’ll make sure it gets updated.

The section headings in DefaultEngine.ini should be modified as follows from the [documentation][1]:

Change [Engine.GameEngine] to [/Script/Engine.GameEngine]

Change [OnlineSubsystemSteam.SteamNetDriver] to [/Script/OnlineSubsystemSteam.SteamNetDriver]

Online Subsystem Steam Interface in Unreal Engine | Unreal Engine 5.1 Documentation

7

Thanks! That did the trick for the binding.

[2014.07.23-08.04.04:349][613]LogNet:Display: SteamNetDriver_0 bound to port 7777
[2014.07.23-08.04.04:349][613]LogNet: GameNetDriver SteamNetDriver_0 IpNetDriver listening on port 7777

However now I am getting this:

8

I know this is an old post but i am getting this error still, and i followed several different tutorials with different INI settings, and also the epic documentation.

[2016.03.10-05.24.10:266][407]LogNet:Warning: Failed to init net driver ListenURL: /Game/Maps/Lobby?listen: SteamSockets: binding to port 7777 failed (0)
[2016.03.10-05.24.10:266][407]LogNet:Warning: Network Failure: GameNetDriver[NetDriverListenFailure]: SteamSockets: binding to port 7777 failed (0)
[2016.03.10-05.24.10:266][407]LogNet: NetworkFailure: NetDriverListenFailure, Error: 'SteamSockets: binding to port 7777 failed (0)'
[2016.03.10-05.24.10:266][407]LogWorld: Failed to listen: SteamSockets: binding to port 7777 failed (0)
[2016.03.10-05.24.10:266][407]LogNet:Error: LoadMap: failed to Listen(/Game/Maps/Lobby?listen)
[2016.03.10-05.24.10:266][407]LogWorld: Bringing World /Game/Maps/Lobby.Lobby up for play ( tick rate 0) at 2016.03.09-21.24.10
[2016.03.10-05.24.10:266][407]LogWorld: Bringing up level for play took: 0.000284
9

Did you set up your DefaultEngine.ini as suggested in the answer below?

10

Had the same bug. UE4.15

Fix was int the DefaultEngine.ini
change
[/Script/Engine.Engine]
to
[/Script/Engine.GameEngine]

(Slightly different variant of the above fix.)