一、.對於centos7自帶的防火牆的相關指令 

#停止firewall 

systemctl stop firewalld.service

#禁止firewall開機啟動 

systemctl disable firewalld.service

#檢視firewall的狀態

systemctl status firewalld.service

二、對於centos6 iptables防火牆的相關狀態 

#關閉防火牆—–service iptables stop  

#啟動防火牆—–service iptables start  

# 重啟防火牆—–service iptables restart  

# 檢視防火牆狀態–service iptables status  

# 永久關閉防火牆–chkconfig iptables off  

# 永久關閉後啟用–chkconfig iptables on