# Advanced Sessions Plugin

**URL:** <https://forums.unrealengine.com/t/advanced-sessions-plugin/30020>\
**Category:** Programming & Scripting\
**Tags:** unreal-engine\
**Created:** [May 13, 2015, 7:26pm UTC](https://forums.unrealengine.com/t/advanced-sessions-plugin/30020 "2015-05-13T19:26:21Z")\
**Posts on this page:** 1\
**Showing post:** 84

<div class="post-metadata">

**Author:** ![Nyhaalm](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/nyhaalm/32/883727_2.png) [@Nyhaalm](https://forums.unrealengine.com/u/Nyhaalm)\
**Post date:** [August 6, 2015, 6:37pm UTC](https://forums.unrealengine.com/t/advanced-sessions-plugin/30020/84 "2015-08-06T18:37:11Z")

</div>

I just tested it with the logs.

This is what happens when i start the lobby as listen server.

 ![Log.png](https://d3kjluh73b9h9o.cloudfront.net/original/3X/8/8/88114a636166663ca3ae9a029e7ca60b464769a2.png)&stc=1

Maybe it’s my firewall blocking the port.

_Edit_  
Nope, it’s not my firewall.  
Maybe i do have to open a session first.

_Edit_  
Open a session first doesn’t fix it.

_Edit_

Hallelujah, i think i fixed it.

the defaultengine.ini Onlinesubsystem Sections has to be in this exact order.

```auto

[/Script/Engine.GameEngine]+NetDriverDefinitions=(DefName="GameNetDriver",DriverClassName="OnlineSubsystemSteam.SteamNetDriver",DriverClassNameFallback="OnlineSubsystemUtils.IpNetDriver")

[OnlineSubsystem]
DefaultPlatformService=Steam
PollingIntervalInMs=20
 

[OnlineSubsystemSteam]
bEnabled=true
SteamDevAppId=480
GameServerQueryPort=27015
bRelaunchInSteam=false
GameVersion=1.0.0.0
bVACEnabled=1
bAllowP2PPacketRelay=true
P2PConnectionTimeout=90

[/Script/OnlineSubsystemSteam.SteamNetDriver]
NetConnectionClassName="OnlineSubsystemSteam.SteamNetConnection"

```

Now it gives me what i want.

 ![Log.png](https://d3kjluh73b9h9o.cloudfront.net/original/3X/5/6/56e153674e393c55c0a37006983333a112ec142f.png)&stc=1

_edit_  
Only the session creation works now, but not joining.  
The client joining the server still does the failed to bind to port 0 error.

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