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Valheim Server Setup Guide 2026

Complete step-by-step tutorial to set up your own Valheim server

Free TutorialStep-by-Step GuideCode ExamplesTroubleshooting Tips
Valheim
V

Valheim

Iron Gate AB • February 2, 2021

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Valheim Server Requirements

What You'll Need

Software Requirements

  • Valheim installed
    Buy Valheim
  • Valheim Dedicated Server files
    Get via SteamCMD
  • Minimum 2GB RAM (4GB+ recommended)
  • Port 2456-2458 forwarded
  • World backup system recommended

Hardware Requirements

Minimum (5-10 players)
  • • CPU: 2.6 GHz Dual Core
  • • RAM: 4 GB RAM
  • • Storage: 1 GB available space
  • • Network: 10+ Mbps upload
Recommended (20+ players)
  • • CPU: Intel Core i5 or equivalent
  • • RAM: 8 GB RAM
  • • Storage: 1 GB available space (SSD)
  • • Network: 50+ Mbps upload

Step-by-Step Valheim Server Setup

1

Step 1: Download Valheim Dedicated Server from Steam

Download Valheim Dedicated Server from Steam

2

Step 2: Create server directory and world files

Create server directory and world files

3

Step 3: Configure start_headless_server

Configure start_headless_server.bat with your settings

Code Example:

batch
valheim_server.exe -name "My Valheim Server" -port 2456 -world "MyWorld" -password "mypassword" -public 1
4

Step 4: Set server name, password, and world name in the configuration

Set server name, password, and world name in the configuration

5

Step 5: Configure server settings and install mods if desired

Configure server settings and install mods if desired

6

Step 6: Forward ports 2456, 2457, 2458 on your router

Forward ports 2456, 2457, 2458 on your router

7

Step 7: Start the server using the batch file

Start the server using the batch file

8

Step 8: Set up automatic backups and restarts for server maintenance

Set up automatic backups and restarts for server maintenance

Valheim Server Configuration

Basic Settings

Server NameMy Valheim Server
Max Players20
Game Modesurvival
Difficultynormal

Advanced Settings

Performance Optimization

  • • Allocate 1GB RAM per 4-6 players
  • • Use SSD storage for better performance
  • • Optimize view distance based on player count
  • • Enable server-side optimizations

Security Settings

  • • Set strong admin passwords
  • • Configure firewall rules
  • • Enable whitelist if needed
  • • Regular backup schedule

Common Valheim Server Issues & Solutions

🚫 Players Can't Connect to Server

Symptoms: Server appears offline, connection timeouts

Solutions:

  • Check port forwarding configuration (port 25565 for Minecraft)
  • Verify firewall settings allow server traffic
  • Confirm server is running and listening on correct port
  • Test with local IP first, then external IP

⚠️ Server Lag and Performance Issues

Symptoms: Slow response, block lag, entity lag

Solutions:

  • Increase RAM allocation (minimum 2GB recommended)
  • Reduce view distance in server properties
  • Limit entity spawning and mob farms
  • Use performance optimization plugins

💥 Server Crashes Frequently

Symptoms: Unexpected shutdowns, error messages

Solutions:

  • Check server logs for error messages
  • Ensure sufficient RAM allocation
  • Update server software to latest version
  • Remove problematic plugins or mods

Server Setup Complete! 🎉

Your Valheim server is ready. Now let's get players to join!

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