Install a SCUM server

Step-by-step installation

1. 1

   Prepare a 64-bit Windows machine (PC or Windows Server) with at least 8 GB RAM.

2. 2

   Install Visual C++ (2012, 2013, 2015-2022) and the DirectX End-User Runtimes.

3. 3

   Download SteamCMD and install the server with app_update 3792580 (anonymous login).

4. 4

   Start SCUMServer.exe with -log -port=7777 -MaxPlayers=64 and wait for it to finish loading.

5. 5

   Stop the server and edit SCUM/Saved/Config/WindowsServer/ServerSettings.ini.

6. 6

   Open UDP ports 7777, 7778 and 7779 in the Windows firewall and at your provider.

7. 7

   Test the connection in game (127.0.0.1:7777 locally, then the public IP).

8. 8

   Create a scheduled task to start the server automatically.

9. 9

   Schedule updates, backups of SCUM/Saved and restarts.

Requirements

• 64-bit Windows required (the server will not run on 32-bit)
• RAM: 8 GB minimum, more with more players and settings
• Disk: ~8 GB of files, 15 GB free recommended
• No Steam account needed (anonymous). Linux: no official native server documented — use a Windows VPS

Install (Windows local, VPS or dedicated)

Same procedure locally or on Windows Server. Run these commands in PowerShell, then join 127.0.0.1:7777. -MaxPlayers overrides the file value; -nobattleye disables BattlEye (not recommended).

C:\steamcmd\steamcmd.exe +force_install_dir C:\scumserver +login anonymous +app_update 3792580 validate +quit
cd C:\scumserver\SCUM\Binaries\Win64
.\SCUMServer.exe -log -port=7777 -MaxPlayers=64

Ports to open

Values from the SCUM wiki with -port=7777: the query port is port+2 and the raw socket port+1. Change -port= to move the whole block. When running locally, avoid a query port between 27020 and 27050 (used by Steam). On a home router, forward these ports (NAT) to the machine; at OVH, Hetzner, Scaleway, also open them in the provider firewall/security group; test from another network.

• 7777/UDP — game client (-port=)
• 7778/UDP — raw UDP socket (port+1)
• 7779/UDP — Steam server browser query (port+2)
• 7777/TCP — RCON (optional)

Windows firewall

Administrator PowerShell:

netsh advfirewall firewall add rule name="SCUM UDP" dir=in action=allow protocol=UDP localport=7777-7779

Auto start (scheduled task)

Create a start.bat script (cd into SCUM\Binaries\Win64 then SCUMServer.exe -log -port=7777 -MaxPlayers=64) and run it at startup as SYSTEM. For supervision, add a second task that restarts the process if it is stopped.

schtasks /create /tn "SCUM Server" /tr "C:\scumserver\start.bat" /sc onstart /ru SYSTEM /rl HIGHEST

Updates and backups

Stop the server, copy SCUM\Saved, rerun the SteamCMD command (same as the install) and restart. Schedule a daily restart with schtasks.

taskkill /IM SCUMServer.exe /F
robocopy C:\scumserver\SCUM\Saved C:\backups\scum-%DATE:~-4%%DATE:~3,2%%DATE:~0,2% /E
C:\steamcmd\steamcmd.exe +force_install_dir C:\scumserver +login anonymous +app_update 3792580 validate +quit
schtasks /create /tn "SCUM restart" /tr "C:\scumserver\start.bat" /sc daily /st 05:00

List and find your server

The server shows up in the Steam/SCUM browser through the query port (UDP 7779) once ServerName is set. Also add your server on game-rank.com/jeux/scum for visibility.

Troubleshooting

• Server will not start: install Visual C++ (2012/2013/2015-2022) and DirectX Runtimes, and check you are on 64-bit Windows.
• Not in the server list: open UDP 7779 (query) and make sure the query port is not between 27020 and 27050.
• Connection refused from the Internet: missing NAT forwarding or provider firewall rule on 7777-7779/UDP.
• Settings overwritten: some panels rewrite ServerName/WelcomeMessage at start; change them in the panel.
• After an update the config changes: start the server once and compare with the generated ServerSettings.ini (keys evolve).

Frequently asked questions

What is the SCUM server App ID?

3792580 (not to be confused with the other SCUM server application). Command: steamcmd +force_install_dir <folder> +login anonymous +app_update 3792580 validate +quit.

Which ports does SCUM use?

With -port=7777: UDP 7777 (game), UDP 7778 (raw socket), UDP 7779 (query) and TCP 7777 for optional RCON. Hosts may use other values.

Can I host SCUM on Linux?

No native Linux server is officially documented: a Windows VPS or dedicated server is the simplest and most reliable. Community Wine/Docker setups exist but are not covered here.

How do I update the server?

Stop it and rerun the same SteamCMD command with app_update 3792580; back up SCUM\Saved first.