RPC Server Is Unavailable

RPC Server Is Unavailable

Today when using opmanager to explore Windows, use WMI I found that RPC is not available, so I turned on TCP/135, But it is found that there are clients that have joined the domain, which can be successfully authenticated But there is no client that joins the domain, so there is no way to successfully authenticate So I turned off the firewall of the client that did not join the domain, Can be successfully certified again, How can I successfully authenticate with the firewall turned on?!