[recursive]

If you're getting a status code like 404 or 500, it means there's no problem between you and the web server. The status codes come from the server. The exception is when you get a gateway/reverse proxy error. Usually 503 I think. That means the web server is down, but there's another server in front of it reporting that it's down.

[harry_ord]

True, I thought of those as they're just more informative about why you're not getting what you're looking for.

[YZF]

502 Bad Gateway.