centos7 Common commands of firewall

  • 2020-07-30 07:38
  • views 26
  • CentOS



CentOS7 use systemctl Command to manage a single service of the system , stay CentOS7 In terms of firewalld（ firewall ） Service opening , close , The same instruction is used for status queries , The operation is as follows ：

Start firewall ： systemctl start firewalld

View firewall status ： systemctl status firewalld 

Turn off the firewall ： systemctl stop firewalld

Enable firewall service at power on ：systemctl enable firewalld

Disable firewall service at power on ：systemctl disable firewalld

Query whether the firewall service is started ：systemctl is-enabled firewalld

Query the list of started services ：systemctl list-unit-files|grep enabled

Query the list of services that failed to start ：systemctl –failed

When installing software or column Library , In addition to directly opening and closing the firewall , You can also open the connection directly through the port operation ; Add port ：firewall-cmd –zone=public –add-port=80/tcp –permanent 

Update firewall rules ：firewall-cmd –reload

View port status ：firewall-cmd –zone=public –query-port=80/tcp

Remove open ports ：firewall-cmd –zone=public –remove-port=80/tcp –permanent

Firewall rules are updated every time , All need to be updated ：firewall-cmd –reload, Update status ;

in addition , After updating the firewall settings , You can also view all open ports ：firewall-cmd –zone=public –list-ports

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