TCP port monitoring

A TCP check tests whether an agent can establish a connection to a host and port. Success confirms that the port accepts connections; it does not validate the application's response.

Target

Enter a hostname or IP address and the service's TCP port, for example db.example.com and 5432. Use HTTP, SMTP or RabbitMQ when the protocol needs to be checked.

Create the check

1. Open Dashboard → Add check and select this check type.
2. Enter a recognizable name, complete the target fields above and select locations under Run checks from.
3. Click Next. On Settings, set the check interval and request timeout in seconds, retries and, if needed, a response-time threshold in milliseconds. A threshold of 0 disables slow-response warnings.
4. On Notifications, choose saved channels, priority and an optional runbook. Set the check group, description and enabled state.
5. Click Create check and verify a fresh result from each selected location.

See the illustrated check wizard, notification setup and result guide.