I know the default response to the RD page is:
RelayDiagnostics is not enabled.
To enable RelayDiagnostics and optionally set a password to protect the page, see BigFix Official Documentation.
…but can we disable even that? I have some relays I don’t want even that response. I would want a straight up non-response. At the very least, it should respond like the root folder. “404 – Not Found”