1. Firewall opening, closing, and disabling commands
(1) Set the boot to enable the firewall:
systemctl enable firewalld.service
(2) Set the boot to disable the firewall:
systemctl disable firewalld.service
(3) Start the firewall:
systemctl start firewalld
(4) Turn off the firewall:
systemctl stop firewalld
(5) Check the firewall status:
systemctl status firewalld
2. Use firewall-cmd to configure ports
(1) Check the firewall status:
firewall-cmd --state
(2) Reload configuration:
firewall-cmd --reload
(3) View open ports:
firewall-cmd --list-ports
(4) Open the firewall port:
firewall-cmd --zone=public --add-port=9200/tcp --permanent
Command meaning:
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–zone #Scope
-
–add-port=9200/tcp #Add port, the format is: port/communication protocol
-
–permanent #Permanently effective, without this parameter, it will fail after restarting
Note: After adding a port, you must reload it with the command firewall-cmd --reload to take effect
(5) Close the firewall port:
firewall-cmd --zone=public --remove-port=9200/tcp --permanent