Common firewall commands under Linux

The firewall configuration of CentOS7 is very different from the previous version. The firewall of this version of CentOS7 uses firewall by default.

Here is a reference address: https://www.cnblogs.com/sucretan2010/p/10835175.html

1. Turn off the firewall:

systemctl stop firewalld.service

2. Turn on the firewall:

systemctl start firewalld.service

3. Turn off and start up:

systemctl disable firewalld.service

4. Turn on startup:

systemctl enable firewalld.service
List
1 firewall-cmd --list-all  或者 firewall-cmd --zone=public --list-ports

5、防火墙添加端口
firewall-cmd --zone=public --add-port=8080/tcp --permanent
6 移除端口
firewall-cmd --zone=public --remove-port=80/tcp --permanent
7查看防火墙状态，是否是running
firewall-cmd --state
8重新载入配置，比如添加规则之后，需要执行此命令
firewall-cmd --reload