CentOS 7 默認(rèn)使用的是firewall作為防火墻

基本 命令

# 安裝
yum install firewalld

# 安裝圖形界面（用于圖形界面）
yum install firewall-config

# 啟動(dòng)
systemctl start firewalld.service

# 停止
systemctl stop firewalld.service

# 禁止開(kāi)機(jī)啟動(dòng)
systemctl disable firewalld.service

# 開(kāi)機(jī)啟動(dòng)
systemctl enable firewalld.service

# 查看運(yùn)行狀態(tài)
firewall-cmd --state

詳解參考：

• http://havee.me/linux/2015-01/using-firewalls-on-centos-7.html
• https://blog.linuxeye.cn/406.html