When a node is added to a Cloud Server as an inverse node, by running the 'nxserver --serveradd' command on the node, and the administrator enables further authentication for that node, the setting is not taken into account when accessing the node from the Cloud Server.

The issue occurs when the node is running a server v9 or v10 and the Cloud Server is v8.

As a workaround:
- Update the Cloud Server from v8 to v10.
- Add the node directly from the Cloud Server by using 'nxserver --nodeadd' instead of configuring it as an inverse node.