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

Valheim server won't connect? Port 2456-2458 UDP, firewall, wrong password & Steam server list – connection troubleshooting.

**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](/en/gameserver/valheim/setup)
- [Valheim performance](/en/gameserver/valheim/performance)