在监控系统资源的时候要关闭防火墙，否则会出现以下错误：
Monitor name :UNIX Resources. Cannot initialize the monitoring on 192.168.136.143. Error while creating the RPC client. Ensure that the machine can be connected and that it runs the rstat daemon (use rpcinfo utility for this verification). Detailed error: RPC: Failed to create RPC client.
关闭防火墙:/etc/init.d/iptables stop
另外在配置mysql远程登录的时候也需要用到：
关闭防火墙:/etc/init.d/iptables stop
配置端口: vi /etc/sysconfig/iptables
增加: -A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
Unlock table