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It is possible to go back to a more classic iptables setup. First, stop and mask the firewalld service:
systemctl stop firewalld systemctl mask firewalld
Then, install the iptables-services package:
yum install iptables-services
Enable the service at boot-time:
systemctl enable iptables
Managing the service
systemctl [stop|start|restart] iptables
Saving your firewall rules can be done as follows:
service iptables save
or
/usr/libexec/iptables/iptables.init save
开启端口
firewall-cmd --zone=public --add-port=80/tcp --permanent
命令含义:
--zone #作用域
--add-port=80/tcp #添加端口,格式为:端口/通讯协议
--permanent #永久生效,没有此参数重启后失效
重启防火墙
firewall-cmd --reload
参考:https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Security_Guide/sec-Using_Firewalls.html
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原文地址:http://my.oschina.net/u/860872/blog/514421