如何查看和修改防火墙开放端口与规则

答案就是修改配置文件！

在/etc/firewalld/zones/public.xml中

[root@xxx ~]# vim /etc/firewalld/zones/public.xml
<?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="ssh"/>
  <service name="dhcpv6-client"/>
  <service name="http"/>
  <service name="https"/>
    
  <!--此处是开放端口-->
  <port protocol="tcp" port="80"/>
    
  <!--此处是开放端口规则-->
  <rule family="ipv4">
    <source address="172.17.0.0/16"/>
    <accept/>
  </rule>
</zone>

如果要添加规则或者端口的话直接按照他的格式写就可以了。