Linux关闭防火墙步骤

1   先查询防火墙状态

[root@old-09 ~]# /etc/init.d/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         

2   关闭防火墙

/etc/init.d/iptable stop  (执行2次怕1次关不上)

[root@o09 ~]# /etc/init.d/iptables stop
iptables: Setting chains to policy ACCEPT: filter          [  OK  ]
iptables: Flushing firewall rules:                         [  OK  ]
iptables: Unloading modules:                               [  OK  ]

[root@o09 ~]# /etc/init.d/iptables status
iptables: Firewall is not running. 

3   查看是否开机自动启动 （数字3项）

[root@o09 ~]# chkconfig | grep iptables

iptables       0:off   1:off   2:on    3:on    4:on    5:on    6:off

4   关闭开机自动启动软件

[root@o09 ~]# chkconfig iptables off

5   检查是否关闭

[root@o09 ~]# chkconfig | grep iptables

iptables       0:off   1:off   2:off   3:off   4:off   5:off   6:off