1 firewalld

# 查看当前防火墙规则


<NolebasePageProperties />




firewall-cmd --list-all

# 允许ICMP ping
firewall-cmd --zone=public --add-icmp-block=echo-request --permanent

# 添加SSH服务
firewall-cmd --zone=public --add-port=22/tcp --permanent
firewall-cmd --zone=public --add-service=ssh --permanent

# 重新加载防火墙规则使更改生效
firewall-cmd --reload

2 关闭防火墙

systemctl stop firewalld

3 开启防火墙

systemctl start firewalld

4 禁用防火墙服务

systemctl disable firewalld

5 启用防火墙服务

systemctl enable firewalld
systemctl start firewalld