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1 firewalld

bash
# 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

bash
systemctl stop firewalld

3 开启防火墙

bash
systemctl start firewalld

4 禁用防火墙服务

bash
systemctl disable firewalld

5 启用防火墙服务

bash
systemctl enable firewalld
systemctl start firewalld