How to Fix Minecraft Port 25565 Showing Closed

Direct answer

A closed Minecraft Java port usually means no reachable process is listening on the tested public TCP endpoint, or a firewall/router/provider is blocking it. Check the exact listening port before editing DNS.

What it means

Java Edition normally uses TCP port 25565, but panel allocations, proxies and custom server-port values can differ. A local-only binding can make the port unreachable externally.

Practical example: Example: the server may run on TCP 25566 while a public port checker probes TCP 25565, making the wrong endpoint appear closed. First read server-port or the proxy listener, then match the external port in the router and firewall. A failed TCP test cannot determine whether Geyser’s separate UDP port is open.

If you are a player

Verify the server IP, hostname and configured Java port with the owner.
Run port tests from outside the host network, not only on the same Wi-Fi.

If you run the server

Verify the server starts without an Address already in use or Failed to bind error.
Check that the expected TCP port is listening using ss -ltn on Linux or netstat -ano on Windows.
Check the local firewall and cloud/provider firewall rule for inbound TCP.
For home hosting, forward the router’s external TCP port to the right LAN host and internal port.
If router WAN and public IP differ, check CGNAT/double NAT; retest from a separate network.

References

Use the documentation for the exact software and release you run. These sources support the settings or diagnostic behavior used in this fix.

Was this article helpful?

Help us improve this article

Tell us what is missing, unclear, outdated, or incorrect. You can also suggest something we should add.