Query the firewall status: [root@localhost ~]# service iptables status
Stop firewall: [root@localhost ~]# service iptables stop
[root@localhost ~]# service iptables start
[root@localhost ~]# service iptables restart
Permanently disable firewall: [root@localhost ~]# chkconfig iptables off
Permanently disabled: [root@localhost ~]# chkconfig iptables on