How to disable editing of Radmin Settings
You can create a registry key which will disable the option to change Radmin Server settings:
32-bit systems:
[HKEY_LOCAL_MACHINE\SOFTWARE\Radmin\v3.0\Server\Parameters\DisallowChanges]
64-bit systems:
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Radmin\v3.0\Server\Parameters\DisallowChanges]
This registry key forbids changing Radmin Server settings. The key type is binary with possible values of "01 00 00 00" (disallow) and "00 00 00 00" (allow). Of course, if the remote user has Administrator rights, he will be able to remove this registry key.