Firewall开启常见端口命令：
firewall-cmd --zone=public --add-port=80/tcp --permanent firewall-cmd --zone=public --add-port=443/tcp --permanent firewall-cmd --zone=public --add-port=22/tcp --permanent firewall-cmd --zone=public --add-port=21/tcp --permanent firewall-cmd --zone=public --add-port=53/udp --permanent
Firewall关闭常见端口命令：
firewall-cmd --zone=public --remove-port=80/tcp --permanent firewall-cmd --zone=public --remove-port=443/tcp --permanent firewall-cmd --zone=public --remove-port=22/tcp --permanent firewall-cmd --zone=public --remove-port=21/tcp --permanent firewall-cmd --zone=public --remove-port=53/udp --permanent
批量添加区间端口
firewall-cmd --zone=public --add-port=4400-4600/udp --permanent firewall-cmd --zone=public --add-port=4400-4600/tcp --permanent
重启防火墙命令：
firewall-cmd --reload 或者 service firewalld restart
查看端口列表：
firewall-cmd --permanent --list-port
查看状态
systemctl status firewalld或者 firewall-cmd --state
直接修改配置文件
vi /etc/firewalld/zones/public.xml
修改为
<?xml version="1.0" encoding="utf-8"?>
<zone>
<short>Public</short>
<description>For use in public areas. You do not trust the other computers on networks to not harm your computer. Only selected incoming connections are accepted.</description>
<service name="dhcpv6-client"/>
<service name="ssh"/>
<port protocol = "tcp" port = "xxxxx"/>
<port protocol = "tcp" port = "xxxxx"/>
</zone>
修改完成后Reload防火墙即可。
原文：https://www.cnblogs.com/5kyRang3r/p/9691027.html