Valheim Game Server
What is Port 2456?
Port 2456 is the default port for Valheim dedicated game servers. Valheim, a popular survival and exploration game by Iron Gate Studio, uses ports 2456-2458 for its server operations. Port 2456 handles the main game traffic, port 2457 is used for queries, and port 2458 for Steam communication. Valheim became one of the fastest-selling games on Steam, and its dedicated server software allows players to host persistent game worlds. The server can run on Windows or Linux and is available through SteamCMD. Players connect to the server's IP address and port 2456 to join the game world. Port forwarding and firewall configuration are typically required for internet-accessible servers.
Common Uses
- Hosting Valheim dedicated game servers
- Community game server hosting
- Game server provider infrastructure
- Private multiplayer game worlds
Technical Details
Copy-paste commands to check port 2456 (Valheim Game Server) from your terminal
Test connectivity
nmap -p 2456 -sU -sV example.com
(echo > /dev/tcp/example.com/2456) 2>/dev/null && echo "open" || echo "closed"
Open port in firewall
sudo ufw allow 2456/udp
sudo iptables -A INPUT -p udp --dport 2456 -j ACCEPT
sudo firewall-cmd --permanent --add-port=2456/udp && sudo firewall-cmd --reload
Security Considerations
Game servers should be isolated from other services. Only open ports 2456-2458 for Valheim. Set a strong server password. Keep the server software updated. Monitor for excessive connection attempts. Consider running the server in a container or VM for isolation. Use a separate network or VPS for public game servers.
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