Valheim Server Won't Connect – Port 2456, Password & Firewall

Quick answer: Fix Valheim connection issues with port 2456–2458 UDP, correct server password and open firewall.

If you landed here: Valheim dedicated server runs but nobody can join – "Disconnected", timeout or server not in list.

Open ports

ufw allow 2456:2458/udp

Related

• Set up Valheim server
• Valheim performance