安全機制

1. 設定防火牆。
   

   [root@dyw219 ~]# vim /etc/sysconfig/iptables
   [root@dyw219 ~]# grep 6080 /etc/sysconfig/iptables -B2
   .....
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 5902 -j ACCEPT
   -A INPUT -m state --state NEW -m tcp -p tcp --dport 6080 -j ACCEPT
   ......
   

2. 重新啟動防火牆。
   

   [root@dyw219 ~]# /etc/init.d/iptables restart
   iptables: Flushing firewall rules:                         [  OK  ]
   iptables: Setting chains to policy ACCEPT: nat filter      [  OK  ]
   iptables: Unloading modules:                               [  OK  ]
   iptables: Applying firewall rules:                         [  OK  ]