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VEIN Dedicated Server Setup: App 2131400, Ports & First Join

VEIN Guide • Updated Aug 29, 2026

VEIN Dedicated Server Setup

This guide follows the public VEIN dedicated-server reference. VEIN is in Early Access, so compare the installed package with the reference whenever a binary, flag, or config path changes.

Reference facts

  • Steam app: 2131400
  • Reference platform: 64-bit operating system; Windows is the tested path in the reference.
  • Ports: UDP 7777 game, UDP 7778 query; TCP 7777 is optional if the current setup uses RCON.
  • Starting memory guidance: the reference says to start with at least 8 GB; measure your own world before scaling up.

Install the server app

Use the Steam tool or SteamCMD with the current app ID. Keep the install path and build/branch in your notes. If a provider exposes a one-click template, confirm which app and branch it actually deploys.

force_install_dir C:\VEINServer
login anonymous
app_update 2131400 validate
quit

The command is a starting pattern; use the current SteamCMD syntax and the package's actual files if the reference changes.

Launch the reference Windows binary

VeinServer-Win64-Test.exe -log -port=7777 -MaxPlayers=64

This is the example shown in the community-maintained dedicated-server reference, not a permanent promise that every branch supports the same executable or player limit. Verify the current binary and choose a player limit your world and host can sustain.

Open the documented ports

PortTransportPurpose
7777UDPGame traffic
7778UDPQuery/listing traffic
7777TCPOptional RCON path when enabled by the current setup

Keep provider mapping, firewall rules, launch flags, and the address given to players consistent. Query success does not prove game traffic is reachable.

First-join test

  1. Start with one trusted player.
  2. Confirm the server appears or connect using the current host's documented endpoint.
  3. Test a harmless world change and a reconnect.
  4. Stop cleanly and verify that the save is still present.
  5. Only then invite the rest of the group.

When setup fails

  • Process exits: compare the binary, branch, working directory, and log.
  • Not listed: check the query port and listing state.
  • Listed but cannot join: check UDP game traffic, firewall, provider mapping, and client/server build.
  • Wrong world: stop changing ports and follow the save workflow.

Related guides

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