Down unreachable node by HTTP

Hello, everyone. It is my first time when I am messaging here. Please forgive me if I am doing something wrong =)
I have a silly question because the current documentation did not help me.
I tried to down the unreachable node by http endpoint according to the page ( ).
The current cluster state is the next:





I tried to down the unreachable node and received the error.


curl -X PUT -d 'operation=DOWN'


A request was made of a resource using a request method not supported by that resource;

Out of the box management does not allow operations that change the cluster, see

Make sure you configure HTTPS and some form of authentication for a production environment where you enable other routes than the read-only ones.

Thank you. It works. I did not notice the lines before API description.