: A small, persistent UI overlay that turns green when a local API call succeeds and red when it fails (e.g., 404 or 500 errors Environment Switcher
If you are seeing an error related to this address, it usually means the software that is supposed to be "listening" at Port 11501 isn't running. You can check what is currently using the port on your machine by opening a terminal and running: netstat -ano | findstr :11501 Mac/Linux: lsof -i :11501 Are you trying to start a specific server on this port, or did you encounter it in an error message What is localhost and how does 127.0.0.1 work? - IONOS localhost-11501
: If the service is web-based, you can access it by navigating to http://localhost:11501 in your web browser. : A small, persistent UI overlay that turns
: Your security software might block Port 11501. Temporarily disable your firewall to see if the connection works, or add an exception for this port. : Your security software might block Port 11501
docker run -p 11501:3000 my-app
Generally, localhost connections are safe because they never leave your physical computer. However, you should always be cautious if a program asks to open a port to the public internet. If you are developing an app on 11501, ensure it is only accessible via 127.0.0.1 and not your public IP address unless you have a specific reason to share it.