OS Name/Version:
Debian 12 (running as VM under Proxmox VE 8.3)
Product Name/Version:
AMP (Application Management Panel) — CS:GO Dedicated Server Instance
AMP build: latest (as of 04/10/2025)
Problem Description:
External players cannot connect to my CS:GO Dedicated Server through a public IP (using reverse proxy via localtonet).
When I connect from my local network using the local IP, everything works correctly.
When I connect from my local network but using the external/public IP through localtonet, it also works fine — I can join the server without issues.
However, when my friends try to connect using the same external/public IP (through localtonet), they immediately get dropped with the following Steam authentication error:
STEAMAUTH: Client Ex1r4 received failure code 10
STEAMAUTH: Client _DemoKnight_ received failure code 10
disconnected (reason "Client dropped by server")
My own account (“egore4606”) connects successfully with no SteamAuth errors.
Steps to reproduce:
-
Run a CS:GO Dedicated Server instance in AMP on a Debian 12 virtual machine (under Proxmox VE).
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Expose only port 27015 externally via localtonet (reverse proxy).
-
Try connecting to the server:
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From inside the local network via local IP → works.
-
From inside the local network via external IP through localtonet → works.
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From an external PC (friend) via the same public IP through localtonet → fails.
-
-
Observe the “STEAMAUTH failure code 10” errors in AMP console logs for external clients.
Actions taken to resolve so far:
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Restarted both the CS:GO server and the entire AMP instance.
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Verified the game files and updated via SteamCMD.
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Tried restarting Steam services and checking authentication status.
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Opened port 27015 in both the router and firewall (localtonet also confirms it’s exposed).
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Tested both TCP and UDP exposure on port 27015.
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Confirmed that connecting through the external IP works only locally, not for remote clients.
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Verified that the “Your server needs to be restarted…” message persists even after restarts.
Full relevant log excerpt:
10/04/2025 - 17:22:21: STEAMAUTH: Client Ex1r4 received failure code 10
10/04/2025 - 17:22:21: "Ex1r4<2><STEAM_1:1:517164706><>" disconnected (reason "Client dropped by server")
10/04/2025 - 17:22:31: Your server needs to be restarted in order to receive the latest update.
10/04/2025 - 17:23:12: "_DemoKnight_<3><STEAM_1:0:577153701><>" connected, address ""
10/04/2025 - 17:23:13: STEAMAUTH: Client _DemoKnight_ received failure code 10
10/04/2025 - 17:23:13: "_DemoKnight_<3><STEAM_1:0:577153701><>" disconnected (reason "Client dropped by server")
10/04/2025 - 17:23:23: Your server needs to be restarted in order to receive the latest update.
10/04/2025 - 17:24:10: "egore4606<4><STEAM_1:0:578579696><>" connected, address ""
10/04/2025 - 17:24:11: "egore4606<4><STEAM_1:0:578579696><>" STEAM USERID validated
10/04/2025 - 17:24:18: "egore4606<4><STEAM_1:0:578579696><>" entered the game
10/04/2025 - 17:24:20: Your server needs to be restarted in order to receive the latest update.
| OS | Linux |
|---|---|
| Platform | Debian GNU/Linux 12 |
| System Type | x86_64 |
| Hardware Platform | SeaBIOS Standard PC (i440FX + PIIX, 1996) |
| CPU Model | QEMU Virtual CPU version 2.5+ |
| CPU Layout | 1S/6C/6T |
| Installed RAM | 7756 |
| Virtualization | Docker |
| Network Mode | Host Mode |
| Module | GenericModule |
| Module Application | Counter-Strike: Global Offensive |
| Loaded Plugins | FileManagerPlugin, EmailSenderPlugin, WebRequestPlugin, WebhookPlugin, LocalFileBackupPlugin, CommonCorePlugin, AnalyticsPlugin |
| Application Name | AMP |
| Application Version | 2.6.3.0 |
| Codename | Phobos |
| Tools Version | 2.6.2.4 |
| Release Stream | Mainline |
| Build Spec | Release |
| Build Date | 26/09/2025 12:10 |
| InstanceID | 3ca9fd2e-4c71-478b-82d9-02bf8fa34c76 |
| Last Executable | /AMP/csgo/740/srcds_linux |
| Last Arguments | -game csgo -console -usercon -nobreakpad -port 27015 -ip 192.168.178.111 -maxplayers_override 8 -authkey ********** -tickrate 64 -insecure -nohltv +tv_port 27020 +sv_logfile 1 +sv_pure 0 +exec server.cfg +map de_dust2 +game_type 0 +game_mode 0 +sv_game_mode_flags 0 +sv_skirmish_id 0 +log on +logaddress_add 192.168.178.111:34855 |
| Last Process ID | 205 |