Linux-centos6.8下關閉防火牆

一、臨時關閉防火牆

1、 查看防火牆的狀態

[root@vpnSS ~]# /etc/init.d/iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         
1    ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0           state NEW udp dpt:8888 
2    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:8888 
3    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
4    ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
5    ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
6    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22 
7    REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 
8    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:80 

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         
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp spt:80

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

3、 查看關閉后的狀態

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

 

二、永久關閉防火牆

命令：chkconfig --level 2345 iptables off 
或者 chkconfig iptables off 
其中2345 代表”執行等級“ 
等級0表示：表示關機 
等級1表示：單用戶模式 
等級2表示：無網絡連接的多用戶命令行模式 
等級3表示：有網絡連接的多用戶命令行模式 
等級4表示：不可用 
等級5表示：帶圖形界面的多用戶模式 
等級6表示：重新啟動