Remote Desktop
Check port 3389
Use this page when you specifically need a quick public answer for port 3389, then compare the result with local shell commands and your router or firewall rules.
Run a public probe for port 3389
Port 3389 is commonly used for Remote Desktop. This page keeps the TCP check focused while still surfacing DNS and web-level context when relevant.
No checks yet. Past probes will appear here for easy re-running.
kordu-probe — tcp
Ready to run
Enter a target and hit Check to run the live connectivity probe.
Common reasons this port fails
- The service is not actually listening on the expected interface.
- The router is not forwarding traffic to the right internal host.
- A host firewall is silently dropping packets.
- The public IP or DNS record points somewhere else entirely.