Quick answer: Minecraft needs port 25565 TCP+UDP open – in UFW, game server panel and optionally router (home only).
If you landed here: Players get "Connection timed out" – port is blocked.
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Frequently asked questions (FAQ)
Which port to open for Minecraft?
Standard Java Edition: TCP and UDP 25565. Bedrock: 19132 UDP. Check server-port in server.properties.
Port open but connection timed out?
Check provider firewall in panel (allocations), leave server-ip empty, use public IP, SRV if using domain.
Do I need router port forward?
Only for home server. At NexoraHost game server/VPS: panel firewall + UFW on server – no home router.