1–首先查看防火墙状态：

service iptables status

[root@localhost rabbitmq]# service iptables status  
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         
1    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
2    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
3    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
4    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22 
5    REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Chain FORWARD (policy ACCEPT)
num  target     prot opt source               destination         
1    REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination   

显然是开启状态

2–永久性生效，重启后不会复原

1开启：

chkconfig iptables on  

2关闭：

chkconfig iptables off  

3.即时生效，重启后复原

1开启：

[root@localhost rabbitmq]# service iptables start

2关闭：

[root@localhost rabbitmq]# service iptables stop

[root@localhost rabbitmq]# service iptables stop  
iptables: Setting chains to policy ACCEPT: filter [  OK  ]
iptables: Flushing firewall rules: [  OK  ]
iptables: Unloading modules: [  OK  ]

4.设置后重启：

[root@localhost rabbitmq]# reboot

   Broadcast message from root@localhost
        (/dev/pts/0) at 23:21 ...

   The system is going down for reboot NOW!

5–linux查看防火墙状态及开启关闭命令 存在以下两种方式：

一、service方式

查看防火墙状态：service iptables status

iptables：未运行防火墙。


开启防火墙： service iptables start

关闭防火墙： service iptables stop


二、iptables方式

先进入init.d目录，命令如下：

[root@centos6 ~]# cd /etc/init.d/

[root@centos6 init.d]#

然后

查看防火墙状态：

[root@centos6 init.d]# /etc/init.d/iptables status

暂时关闭防火墙：

[root@centos6 init.d]# /etc/init.d/iptables stop

重启iptables：

[root@centos6 init.d]# /etc/init.d/iptables restart