How can I troubleshoot a 'Connection Refused' error (10060) when using Indy in Delphi?

Troubleshooting involves several steps: 1) Verify the server application is running and listening on the correct port. 2) Check your firewall settings to ensure the application and port are allowed. 3) Confirm the IP address and port number in your Indy component's configuration are accurate. 4) Use a network utility (like `ping` or `telnet`) to test basic network connectivity to the server.