To be fair, the question implies the port number of the local service is the problem, when it's more about making sure users can access it without needing to specify a port number in the URL.

Yes, an experienced person might be able to suss out what the real problem was, but it's not really the LLMs fault for answering the specific question it was asked. Maybe you just wanted to run a server for testing and didn't realize that you can add a non-standard port to the URL.