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MtrXTools

ERR_CONNECTION_REFUSED

Nothing accepted the connection on that port

Seen in Chrome, Edge, Brave ("This site can't be reached")

The browser reached the host, but it actively refused the connection because nothing is listening on that port or a firewall rejected it.

Common causes

  • The web server or local dev server is not running, or is listening on a different port.
  • The service listens only on 127.0.0.1, so other devices or containers cannot reach it.
  • A firewall is rejecting connections to the port.
  • A broken proxy setting sends the browser to a proxy that is not running.

How to fix it

  1. Start the server and check the port it uses (e.g. "ss -ltnp" on Linux, "netstat -ano" on Windows).
  2. Bind the service to 0.0.0.0 or the right interface if it must be reached from other machines.
  3. Open the port in the host firewall or cloud security group.
  4. Check the browser or system proxy settings.
Check whether the port is open

Got a different message? Paste it into the error explainer.

Related errors

All 40 Browser & TLS errors