linux7打开、关闭端口

CentOS7使用的是firewall防火墙，不再是原来的iptables

1：查看firewall防火墙状态

       firewall-cmd –state

       或者

       systemctl status firewalld

2：打开防火墙

       systemctl start firewalld

3：关闭防火墙

       systemctl stop firewalld

4：重启防火墙

       firewall-cmd –relaod

       或者

       systemctl reload firewalld

5：开机自启动防火墙

       systemctl enable firewalld

6：禁止开机启动防火墙

       systemctl disable firewalld

6：查看已打开的端口

       firewall-cmd –list-ports

7：打开端口

       firewall-cmd –permanent –zone=public –add-port=8080/tcp

      其中permanent表示永久生效，public表示作用域，8080/tcp表示端口和类型

8：关闭端口

       firewall-cmd –permanent –zone=public –remove-port=8080/tcp