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