CentOS7防火墙

1.查看防火墙状态

ystemctl status firewalld

2.开启防火墙

ystemctl start firewalld

3.关闭防火墙

ystemctl stop firewalld

4.防火墙开启5432端口

firewall-cmd --permanent --zone=public --add-port=5432/tc

5.查看开放的端口列表

firewall-cmd --zone=public --list-port