CentOS開啓關閉端口方法

• 打開端口：

[root@host ~]# /sbin/iptables -I INPUT -p tcp --dport 8080 -j ACCEPT 
[root@host ~]# /etc/init.d/iptables save   
[root@host ~]# service iptables restart    

• 關閉端口

[root@host ~]# /sbin/iptables -I INPUT -p tcp --dport 8080 -j DROP 
[root@host ~]# /etc/init.d/iptables save  
[root@host ~]# service iptables restart   

• 查看端口打開狀態

[root@host ~]# service iptables status
Table: filter
Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination
1    ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:8080

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

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