CentOS7中执行

service iptables start/stop

会报错Failed to start iptables.service: Unit iptables.service failed to load: No such file or directory.

在CentOS 7或RHEL 7或Fedora中防火墙由firewalld来管理,

如果要添加范围例外端口 如 1000-2000
语法命令如下:启用区域端口和协议组合
firewall-cmd [--zone=<zone>] --add-port=<port>[-<port>]/<protocol> [--timeout=<seconds>]
此举将启用端口和协议的组合。端口可以是一个单独的端口 <port> 或者是一个端口范围 <port>-<port> 。协议可以是 tcp 或 udp。
实际命令如下:

添加

firewall-cmd --zone=public --add-port=80/tcp --permanent (--permanent永久生效,没有此参数重启后失效)

firewall-cmd --zone=public --add-port=1000-2000/tcp --permanent

重新载入
firewall-cmd --reload
查看
firewall-cmd --zone=public --query-port=80/tcp
删除
firewall-cmd --zone=public --remove-port=80/tcp --permanent

当然你可以还原传统的管理方式。

执行一下命令:

systemctl stop firewalld
systemctl mask firewalld

并且安装iptables-services:

yum install iptables-services

设置开机启动:

systemctl enable iptables
systemctl stop iptables
systemctl start iptables
systemctl restart iptables
systemctl reload iptables

保存设置:

service iptables save

OK,再试一下应该就好使了

开放某个端口 在/etc/sysconfig/iptables里添加

-A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT

参考https://blog.csdn.net/c233728461/article/details/52679558/

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