Platform: most of them are Windows Server 2003, some are CentOS 5

Say if there're many game servers, is there any tools for engineers to easily manage? Below are some requirements.

1. allow RDP (remote desktop) to servers.
2. has group/permission setting. Classify by different functionality. So for people has permission to access certain group, they don't need further enter pwd to RDP servers, the tool will automatically log on the server.
3. log activities: history about who has log on what server.

Thanks.