(Now the company has three computer rooms, one in Thailand (with two cisco routers), one in Hong Kong (with a linux server), and one in Tianjin (with a linux server). Those devices have fixed public IPs. I am now using adsl to surf the Internet in Beijing, and I don't have a fixed ip. I want to monitor the cpu usage of servers and routers in those computer rooms, the capacity of server hard disks, etc. How can this be achieved? Is it possible to do it with mrtg?)