Unable to Access Nginx on macOS Sequoia 15.1 from Local Network

Just to be sure...you installed Nginx on the computer with the IP address 192.168.80.159, and are trying to reach it from a different computer on the same subnet?

Assuming so, was Nginx started on that computer? Is it listening on port 4000? Is there any content for it to serve when contacted? What content is it supposed to be serving? Does that computer (presumably a Mac) have the application firewall turned on that would prevent Nginx from responding to incoming requests? Other security software? Have you tried using a browser instead of cURL to see what a browser reports?

Have you been through Nginx's user documentation? Have you configured it properly (you must have done something since the default port Nginx uses when installed with Homebrew is 8080 to avoid having to run it using sudo)...

You are probably right that it is not properly configured - but since no one knows how you configured it, there's not much advice to give.

I have the same problem. My nginx can be accessed using localhost, but cannot be accessed using the local IP. I added nginx to the firewall, but it didn't work. But everything worked fine after I turned off the firewall.

Not on my Sequoia machine right now, but...I assume there is a + button on the local network access list? Try to add it manually by navigating to the Nginx executable path.

That said, your error was from curl, so you may also have to add it, as I'm not sure local network access rights would be inherited by a forked process.