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<>一、防火墙操作
在Linux系统上的防火墙是一种服务。
<>二、使用步骤
<>1.引入库
查看防火墙状态
systemctl status firewalld
或者
firewall-cmd --state
暂时关闭防火墙
systemctl stop firewalld
永久关闭防火墙
systemctl disable firewalld
开启防火墙
systemctl start firewalld
开放指定端口
firewall-cmd --zone=public --add-port=端口/tcp --permanent
关闭指定端口
firewall-cmd --zone=public --remove-port=端口/tcp --permanent
立即生效
firewall-cmd --reload
查看开放的端口
firewall-cmd --zone=public --list-ports
!!!注意
1、systemctl 是管理Linux中服务命令,可以对服务进行启动、停止、重启、查看状态等操作
2、firewall-cmd是Linux中专门用于控制防火墙的命令
3、为了保证系统安全,服务器的防火墙不建议关闭
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